1937 - 1938
To conduct geological survey and palaeontological work in the Lake Rukwa basin of the African Rift Valley, and to find evidence of an earlier southern extension of Lake Rudolf.
" The Lake Rukwa Expedition was planned to extend my East African Rift Valley work to the south. Before moving to Lake Rukwa from Kenya I planned a brief visit to the area between Lakes Baringo and Rudolf." - V.E. Fuchs, journal.