The existence of this rock shelter was first brought to attention through a gift, which included two woven yucca sandals, made to the Laboratory of Anthropology by Mr. Arthur Bibo. A visit to the site from which the specimens were obtained having revealed a promising situation, plans were laid for excavation. Investigation here was deemed particularly important since no dry cave material had been previously reported from this section. Mr. Ben Florsheim, the owner of the property on which the shelter was located, readily granted permission to carry on the projected work. Preliminary preparation having been made, the writer, assisted by Mr. Stanley Stubbs of the Laboratory staff, began actual operations on November 17th, 1932.