Saturday, December 7

Sarawak, spiders and a 150-year-old mystery

0

The type specimen. – Courtesy of the Oxford Museum of Natural History

Alfred Russel Wallace

THE great naturalist and intrepid traveller Alfred Russel Wallace spent over eight years in Southeast Asia.

During that time, he travelled over 14,000 miles and undertook over 60 journeys, often travelling alone or with one or two native guides.

Being an ardent admirer of Wallace, I have always considered my knowledge of the man and his work to be more than adequate. But it was the work of a colleague on that other great naturalist Charles Darwin that made me reassess my whole perception of not only Wallace but also my own understanding of his work.

Whilst working on spider specimens at the British Museum of Natural History, a fellow arachnologist, Ray Gabriel, stumbled upon a jar at the back of a cupboard. The jar was simply labelled ‘Darwin’s Spiders’. It was with great excitement that he opened the jar and peered inside.

It is a fact that nowhere in any of the literature about Darwin and his travels does it mention that he collected spiders. There is the odd mention of spiders in passing but in truth Darwin passed them over with haste.

This might appear puzzling, spiders are plentiful in the tropics and Darwin would have certainly encountered them on his travels, as indeed would have Wallace. As to why seemingly neither collected, or more importantly recorded them, one can only speculate.

On investigation it soon becomes clear as why this might be. The early entomologists simply lumped arachnids in with insects and it is quite possible that Darwin and Wallace did collect spiders but chose not to separate them.

A more plausible explanation may be that Victorians where a discerning lot when it came to filling their collecting cabinets. Bugs, butterflies and all things entomological where fine but spiders were viewed with utter disdain.

From Darwin and Wallace’s point of view, there was simply no monetary gain to be had on our eight-legged friends.

There is another plausible reason as to why spiders were not collected in big numbers. Spiders are in the main nocturnal and the early explorers would have found it difficult to traverse the rainforest in the dark with only oil lamps to show the way. Indeed, Wallace himself declared that he had no time to collect at night, as he was busy recording his daylight finds.

What my colleague had discovered was ground-breaking. He lovingly laid out the contents and soon realised that the jar contained not only many specimens of spider but also a pair of fangs that obviously belonged to a tarantula. (Downward facing!) He had, in one afternoon, proved that not only did Darwin collect spiders but also tarantulas.

It was a pivotal moment. He published his work in ‘The Journal of the British Tarantula Society’ (Volume 24 No. 3 pp 90-93) and it was on reading his article that I resolved to prove a similar ‘modus operandi’ for Wallace.

In the world of evolutionary science, there is much rivalry between the Darwinians and the Wallacites and, albeit friendly, it nevertheless exists. The story of Darwin and Wallace’s ‘joint’ theory of Evolution by Natural Selection is well documented and here is not the place to discuss it further. What is well known and documented is that Wallace was a collector extraordinaire when it came to insects and whilst his numbers of collected mammals were much less, they were nonetheless equally as impressive.

Over the eight years that he spent exploring the Malay Archipelago, he collected over 110,000 specimens of insects, 7,500 shells, 8,050 bird-skins, 410 mammal and reptile specimens, and numerous specimens of plants and ferns. Of these he kept 3,000 bird-skins plus at least 20,000 beetles and butterflies, as well as some vertebrates and land-shells, for his own private collection.

It is easy in today’s modern world to view such numbers as excessive and perhaps unwarranted, but we must be careful not to apply our 21st century morals on a 19th century mindset. Collectors in those early days needed to fund their research and this was a lucrative way of financing one’s work. There were no TV companies with open chequebooks standing behind them.

My mind was made up. I would search the available documentation and literature to see if I could find whether Wallace had collected spiders as indeed Darwin had.

My first port of call was Wallace’s own masterpiece ‘The Malay Archipelago’. He makes brief mention of “bird eating spiders” but also makes it clear that he has no time for these “monsters”. Wallace was a meticulous collector and kept detailed notes, many of which survive.

I began with Wallace’s letters and correspondences, all well documented on the excellent Wallace On Line Project (http://wallace-online.org/) and, after some searching, I found the following reference in a letter from Octavius Pickard Cambridge addressed to Wallace’s daughter Violet. In it, he states that her father was looking at his collection when he chanced upon a spider and exclaimed, “Why it is my old Sarawak spider,” and that he remembered collecting it “as if it were yesterday”.

So it would seem that a spider was collected in Sarawak, but when and more importantly from where?

I scoured the notebooks that now reside in the Natural History Museum. The records clearly show that Wallace was in Sarawak from November 1854 to January 1856, and during that time he spent his time as a guest of the Rajah James Brooke at his residence at Santubong, collecting at the mines at Simunjan, and scouring the slopes of Gunung Serambu near the gold mining town of Bau.

He recorded each collected specimen on the pages of the now browning books in his own handwriting. Yet there was still no record of the spider. One can only assume that Wallace, like Darwin, did not record the collection of the spider for one or two reasons.

Either he felt it unworthy of recording due to its lack of resale value, or he did not know enough about spiders to hazard a guess to its genus, and without such information it would be pointless. He would certainly have known it was a spider but the question is would he have had any interest in it? The notebook, whilst of great interest, was a dead end.

After more research, I managed to find a copy of the very short paper ‘On some new and little-known spiders (Araneidae)’ Proc Zool Soc Lond 1896, pp 1,006-1,012 by Octavius Pickard Cambridge. The spider is described as Friula wallacii and is accompanied by a number of excellent line drawings. I had now found my quarry, but where might I find the type specimen today?

I now knew that Wallace had collected a spider, when it had been collected, and where from within a few miles. I needed now to find the type specimen. This would be more difficult. Wallace had been in Sarawak for 15 months before moving on to Aru, from here his shipments were all carefully logged and sent to England to Samuel Stevens, Wallace’s agent responsible for the resale of the items.

The meticulous logs show that of many shipments sent from Sarawak, Stevens had sold one such shipment to William Wilson Saunders – a keen entomologist and president of the Entomological Society. Saunders later fell on hard times and sold his entire collection to Pickard Cambridge.

Pickard Cambridge was a keen arachnologist and seeing a spider within the collection described it as Friulla wallacii. Ironically, he had no idea that the spider was one of Wallace’s when he described it. On Cambridge’s death, his entire collection was donated to the Oxford Museum of Natural History. It was here that the type specimen had lain deep within the museum’s vaults.

I contacted my colleague at the museum in Oxford. Again ironically, it was the same person who had discovered Darwin’s spider, and after searching the records, he supplied me with images of the original type. I had found the type and had managed to prove that Wallace did indeed collect spiders. Now all I had to do was find a live specimen in Sarawak. That might prove difficult but the flight was already booked.

This column included contributions from my wife Angela, who is also an arachnid specialist.

The original drawings of Friula wallacii made by Pickard Cambridge.