[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.

[10] In the early 2000s, the Bureau of Land Management launched a survey for the construction of the proposed Harry Allen-Mead 500kV Transmission Line Project.

[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).