Behold, from 1887, a disquisition on certain powers of certain multi-legged individuals: “Some observations on the mental powers of spiders,” George W. and Elizabeth G. Peckham, Journal of Morphology, vol. 1, no. 2 (1887): 383-419. The Peckhams say, early on: “So, also, we have found that to learn anything of the mental processes of spiders […]