I was off on my dates.
According to Spangler:
" 42Cb2640. This site, popularly referred to as "The Cowboy Cache" consists of a historic cache of artifacts... The historic component consists of a cache of tools and household items in two tin-covered wooden chests that have been hidden in a cavity below a large boulder on the talus slope below the first cliff level. Items observed in the cache include hammers, an ax, rubber boots, cloth, rope, tobacco tins, frying pans and other kitchen goods believed to date to 1940 to 1941."