[7] The skull of the ground sloth Nothrotheriops shastensis Sinclair was found in Room 3 by the archaeologist Bertha Parker, who was Harrington's niece and served as expedition secretary.

[8] Excavators also found the dung, backbone, claws and reddish-brown hair of the now-extinct ground sloth (these and other bones from the cave are held by the Natural History Museum of Los Angeles County[9]).

This ancient plant eater survived on capers, mustards, grasses, agave, yucca, phacelia, borages, mints, grape, globemallow, saltbushes and ephedra.

[1] In 2017, a team of scientists conducting research on a skull found on-site by Harrington in the 1930s revealed it actually was a type of extinct, stilt-legged horse that died out during the last ice age (around 13,000 BC).

The species was found not to be closely related to modern horses and was renamed Haringtonhippus francisci after Canadian scientist Charles Harington.