a member of Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews
His photo collections are stored at the National Anthropological Archives of US.
https://sova.si.edu/record/NAA.PhotoLot.85-3?s=0&n=10&t=C&q=Frederick+K.+Morris+photographs+of+East+Asia%2C+1920-1925&i=0
https://sirismm.si.edu/EADpdfs/NAA.PhotoLot.85-3.pdf