Search This Blog

Sunday, 26 April 2020

Wayfaring with fossils.

I have been writing a piece this weekend for younger readers. It's about how geology is everywhere, and I'll probably post it here as well, at some stage, but in the end, I decided not to discuss fossils, but to refer them to this blog, because, as a quick click on the fossils tag below will reveal, fossils are one of my longest-lasting temporary obsessions in and among these pages.

In particular, I decided to refer them to my tale of smuggling a fossil out of Britain. There was no crime in this, but for good and valid scientific reasons, I needed to hoodwink an idiot. When I looked, though, I realised that I have never told that story here, nor is it in my Australian Backyard Earth Scientist.

It is, however, in my Mistaken for Granite, and now, finally, it's here.
Ammonite, Morocco.

Fossils were once anything that was found buried, including archaeological material, and this confusion lives on in some quarters, as this true tale will reveal.

In 1993, I was working for the Australian Museum as an educator, but I had been seconded to an aid project in the Pacific (training science teachers), and I brought home a pickled Giant African Land Snail.

Knowing these snails ought to be a dubious import into Oz, I declared it, outlined the preservation methods used to ensure that it was sincerely dead, explained that it was destined to reside in the Australian Museum, and I was told “You know more about this than I do. Take it.”

Clearly, I had pre-empted the argument phase, but equally clearly, I act honestly. That had to change in late April that same year, when I was forced to get an export safely out of Britain.

A colleague at the museum, knowing I would be in Edinburgh, had asked me to courier home a type specimen of a Devonian fish that he had lodged with the Royal Museums of Scotland in Edinburgh some years earlier.

I agreed, took the right letters to effect the loan, collected the fossil in bubble wrap and cardboard and set off, with the appropriate documents saying what it was, and that it was a proper and legitimate loan.

All was well until I arrived at Heathrow on my way out. As I had all the papers, and worried that there might be questions if I did not show what I had, I declared the fish. The customs officer spoke impeccable English but let us just say that he was clearly of non-British parentage and culture. “You can’t take that,” he said.

I asked why not. “You don’t have the appropriate EU documentation, and you are stealing our heritage.” Now I might have said, “Mate, this is a Scottish fish, I’m a genetic Scot, and it’s being loaned by a Scottish museum to a Scot in Australia—and he found it in the first place—and you're no Scot. So just whose heritage are we talking about?”

I didn’t, because that is not my way. I could see the surreal aspect, but I was diplomatic. It availed me nothing. He still demanded that I surrender the object as yet uninspected, which lay in my carry-on bag. I argued, and explained that it was one of a kind. It was a type specimen, and special to science. He produced an alphabetical list of sciences on a sheet of paper. “Is this archaeology or zoology?”
“Neither,” I said. “It comes under palaeontology.”

He bristled, sensing that I was being smart or worse, and scrutinised his sheet of paper. Because I’m good at reading upside-down, I pointed to the word he was seeking. “It means ‘study of fossils’,” I said.

I had, however, recognised that this gentleman, for all that he was polite, well-informed on paperwork and probably well-meaning, was either untrained or as thick as two bricks—or both. I concluded that this was not somebody who could be trusted to look after a type specimen and treat it with due care.

A type specimen is very special to scientists: it is the original specimen from which a name was given. My colleague had found this fossil, described it and named it, but now it needed some further study, which is why he was borrowing it.

I had, in the same bag, a piece of partly metamorphosed shale from Wales, wrapped in newspaper, so as I was arguing, I brought that to the top of the bag. It was, after all, of no real value to me. Let me emphasise that I did not, at any time, imply that this was the fossil because I am, after all, a totally honest man. I spoke no lie. I cannot reasonably be held to account for the wild conclusions made by the Great Unwashed of Britain.

His hand darted out, seized the package, and tipped the stone out of the protective wrapping so it landed with a bang onto the counter (confirming my assessment of him), turned it over, dug at it with a grubby thumbnail (further confirmation), then handed it back. “I suppose you can take it,” he told me, somewhat reluctantly.

I thanked him nicely, wrapped the Welsh shale again, placed it protectively over the fossil fish in its bubble wrap, and walked off.

I said nothing until I was home, when I told an edited version of this story in a British weekly, New Scientist, as part of a discussion on rare fossils being sent through the mail, the risks they were put under, and the need to have customs officers examine them. The officers needed to be educated first, I said.

My colleague examined the fossil fish as necessary, and it was later couriered safely back to Edinburgh, though not by me. I was lying low, and having outed myself, I have avoided Heathrow ever since, because they may still be waiting for me.

Saturday, 18 April 2020

Bolters, part 9 of many


Clarke the Barber

A few convicts were accepted by the Indigenous people, but the original inhabitants were choosy. Watkin Tench wrote, probably about John Caesar, a man of African ancestry, who was one of the rejects:

One of the convicts, a negro, had twice eloped, with an intention of establishing himself in the society of the natives, with a wish to adopt their customs and to live with them: but he was always repulsed by them; and compelled to return to us from hunger and wretchedness. [1]

Watkin Tench interviewed the survivors of one group of escaped convicts known as Bryant’s party and reported that when they approached land, while sailing along the coast from Sydney to Timor, they often had to flee when threatened by locals. [2]

Against that, we have the more successful adoption cases of William Buckley in Port Phillip (said to be the original Buckley of “Buckley’s chance”), Eliza Fraser of Fraser Island, Barbara Thomson who was rescued from Torres Strait by the crew of HMS Rattlesnake and Tarwood’s party, taken in by the Indigenous people at Port Stephens, north of Newcastle (you will meet them in #11). Some whites were fitted in, and were able to fit in.

And that brings us to a runaway convict called George Clarke, otherwise known as ‘the barber’. Clarke escaped from the Hunter Valley and lived among the Kamilaroi people. He had the scars of an initiated man, but he had been stealing cattle.

Recaptured and questioned in 1831, he had a tale to tell. He said he had heard of a river called the Kindur, running to the north-west, and decided to follow it, hoping to reach another country. He claimed to have followed the Kindur, a fine broad river that flowed to the northwest all the way to the sea. Ernest Favenc argued plausibly that Clarke’s yarn was fabricated to save him from a flogging when he returned but, naturally enough, Clarke the barber claimed that it was all true.

The river was navigable, so ships could sail it, he said, and it flowed on. He was not sure how far it went, but it never flowed to the south of west. In other words, here was a perfect path to take people up into northern Australia, a marvellous river on which to progress toward great riches. He pitched a good yarn: see for yourself:

I always had a great desire to be free from all restraint, and the last time, which is the third that I took to the bush, I determined to proceed as far into the interior as I could get. I also thought, that by making important discoveries in the interior, I should have been pardoned, and have received encouragement from the Government.

I soon effected a junction with a tribe of blacks at Liverpool Plains, and by acquiring their language and assimilating to their manners, I also acquired their good-will. They treated me as one of themselves. I quitted my European costume a little at a time, and felt no inconvenience whatever from the loss. As remaining with this tribe, although attached to me, was not my object, for fear of being recognised by my countrymen, I joined another tribe, and went with them to a place called in the native language Bresa, about 30 miles to the north-west of Liverpool Plains.

I particularly remarked, that the natives, as soon as we got beyond the stations of the settlers, assumed a more active and cleanly appearance; indeed, the wild tribes in the interior are a much superior race to the blacks who frequent our stock stations. From Liverpool Plains I proceeded with a third tribe to Tuaubilla, about 200 miles north-west from that place without discerning any thing of note.

The country was remarkably rich in pasture, well supplied with water, and covered with many large plains. A river, the Numeva, runs from Liverpool Plains to Tuaubilla, which is well supplied with fish. Proceeding down the Numeva, a short distance beyond Tuaubilla, the ground became boggy, and at last presented one vast bog or morass, the river holding its course through the centre.

We crossed a range of mountains to the north, and after a few days, arrived at another river of some magnitude, named Keindooa. There I left the tribe I had come with, as they were returning, and I joined another who inhabited the country north-west of the river Keindooa. The country from this river, changed its aspect altogether. The land was low and level, with few mounts, and without any extended range of hills. The verdure was luxuriant, quite different to any I had before seen.

Grass herbs in abundance, and in clear parts, a multitude of enormous sow-thistles. The grass there produces a large seed, which is gathered by the natives, pounded between stones into a pulp, and baked in the ashes as food. It was palatable, and resembled bread made from grown wheat.

The Keindooa is divided from the Numeva which last is known to my countrymen) by a range of mountains difficult of access. There are few passes over the mountains, but one of them, if improved, would afford an easy ingress to the flat country for drays and horses. The difficulty in crossing the range, consists in the scarcity of water, which, unless the springs be known to the traveller, would leave him exhausted and oblige him to return.

The part where we made the river Keindooa (after crossing the range) was called Curribingee. Thence we proceeded down the river about west. About 250 miles to the north-west of Curribingee, there is a burning mountain called Coorala. The flame and smoke emitted from the mountain can be seen a great distance. I did not ascend the mountain. Round the base is a quantity of red stone, resembling pumice stone; also a substance resembling allum, which, dissolved in water, had the same taste. The natives say, it is to be had in large quantities. It is called by them Boullau.

We proceeded down the river and at last made the sea, into which the Keindooa discharges itself with a broad mouth. The coast was rather low as far as we could see, and just in sight to the south-west we saw an island; but no other land to sea-ward Along the coast, trees, the wood of which is of a deep red colour, had been felled apparently with a small blunt axe; the barrel of each tree (of a good length) had been cut out by a similar instrument, but was gone.

The natives informed me, that people of a light colour came there with large boats, and took the wood away to the northward. I determined to keep with this tribe, until the return of the adventurers, and then to join them; but in the mean time, we again proceeded into the interior. The coast presents a low bleak appearance, and about mile and a half from the sea, the strand is bounded by a low range of mountains, which run along the coast.

When this range is crossed, the country is fertile in the extreme, and very beautiful, as I have before described. There is another species of wood there, which I never saw before, milk white, with a very fine grain, but so hard, that it is difficult to cut it, The natives make their bumbarines and other instruments of war out of this wood, which never breaks; the leaf is in shape like that of the oak, but very rough.

The trees cut by the strangers and removed, were low and very umbrageous; the leaf of a dark blue colour. The pine tree grows in abundance in this country, and is very tall and straight. The natives are remarkably cleanly, kind, and industrious; in nowise like the blacks about the settlements of the Colony. They are provided with tomahawks and knives made from a blue transparent stone, of uncommon hardness, seldom or never breaking.

They grind them to a fine edge by means of other stones. The river Keindooa abounds with fish; one in particular being very fine, resembling a cod-fish, only having very large sharp fins. In the country at the upper part of the river is found stones of beautiful appearance, but what to call them I know not. There are no kangaroos in that country, but there is a small species of bush wallaby, very small; plenty of emu however and black swans, geese, ducks, and birds of fine plumage.

In hopes of being able to provide myself with a few necessaries from my countrymen at Bathurst, I returned by another route to Mullala (250 miles from Bathurst), where I was captured by Serjeant Wilcox. As I never committed any crimes beyond those of theft; I was in hopes my sufferings and my discoveries would have induced the Governor to extend a pardon to me at once, when I would willingly have conducted a party to the places I now describe, and I would also have made other discoveries, which might have proved of service to my country.

GEORGE CLARK

H. M. Gaol, Sydney, Jan. 1832. [3]


The government fell for it, as governments will, because they wanted to believe. A navigable river would be better than an inland sea, and the acting governor of New South Wales, Sir Patrick Lindesay, sent Major Thomas Mitchell out to investigate in November 1831. He went across the Peel, over the Hardwicke Range, and reached the Namoi River about three weeks later.

Expecting a navigable waterway, the party had come equipped with canvas boats, but these snagged in the river, so the party reverted to horseback. They reached the Gwydir, turned west along it for 80 miles (128 kilometres), then struck north to a grand river known locally as Karaula. Mitchell followed this down till the Gwydir joined it and, given that it was heading south, deduced that this was Sturt’s Darling River.

Some of the early explorers who were born and raised in Europe had problems when it came to travelling in Australia. They followed river valleys, because they were used to glaciated landforms where the valleys were broad and easy to walk along. In the old Australian geology, where chasms had been carved by millennia of rare floods, that was not a good move.

Australian valleys were often steep-sided and hard to get out of, and the narrow defile at the bottom was usually blocked by rock fragments that had tumbled down at some point after the valley was carved. Worst of all, there was usually no crystal stream gurgling along, as there would be in any decent European valley.

In the same way, based on what was known of other continents, Major Mitchell, like Banks, Grey and others, was willing to believe in the myth of a great river, stretching across the continent, even though careful mapping of the coast had failed to reveal the mouth of any such river. He had been told by a liar that the river existed, and that was enough.

All the same, if the Kindur River was a non-starter, the rivers had to flow somewhere, so the prospect of an inland sea remained good. Just as the Greek and Roman originators of the European culture once saw their world as surrounding the Mediterranean Sea, so the new Australians dreamed of a continent surrounding an inland sea, hopefully with snow-capped alps somewhere about the Gibson Desert—but not everybody was convinced. Eyre certainly was doubtful.



[1] Watkin Tench, A Complete Account of the Settlement at Port Jackson, 144.
[2] Watkin Tench, A Complete Account of the Settlement at Port Jackson, 147.

Tuesday, 14 April 2020

John Conway's 'Game of Life'.

I have been silent for a week or two, locked down by covid-19, and getting two e-books ready for release, one of these, Playwiths, is STEAM activities suitable for young minds, retired engineers and parents looking for stuff to enlighten minds.

A goodly part of that is recreational mathematics, so when I heard this morning that John Conway had fallen victim to the nasty virus, I felt ashamed that I had never written anything about his delightful Game of Life.

That involves higher mathematics and I mainly do lower mathematics, so this is just to get you started.

John Conway’s Game of Life

In October 1970, fans of recreational mathematics encountered The Game of Life in Scientific American. In those days, before personal computing, we either had programmable calculators or we used pen and paper to amuse ourselves. The calculators couldn’t do Life for us, so it was done on paper. A few, a very few, were able to play it on university computers, but I was a paper player.

All you needed was a grid with some coloured in squares, and a set of rules for generating a new set. A cell that was filled in was live, one that was empty was dead. In the next generation:
any live cell with fewer than two live neighbours died;
any live cell with two or three live neighbours lived on;
any live cell with more than three live neighbours died;
any dead cell with exactly three live neighbours became live.

The simplest starters or seeds were called Still Lifes, because they never altered
 Four still life forms: block, beehive, loaf and tub

Some seeds alternated between two types, and these were called Oscillators. To find out why they get their name, you will need to take up pencil and paper, or look up <“game of life” oscillators> Here are some oscillator seeds, named blinker, toad and beacon:

From left to right, blinker, toad and beacon.

To see how you analyse these shapes, here are marked-up versions of the two stages of the beacon:

  Beacon stage 1        and        Beacon stage 2

This is one to research for yourself, because there isn’t room for any more here, except to note that this shape, known as the r-pentomino, is a methuselah.


The r-pentomino.

And the other e-book? It's called Looking at Small Things, and it's about wee beasties, small bits on plants and animals and other fine detail, using all member of lenses and microscopes. I'm still tidying up around the edges for Small Things, but if you look in the links, you can see how to buy the book from Amazon Kindle, or get it for free.