Robert Neal Rudmose-Brown,
1922 Encyclopædia Britannica — Arctic Regions
“ The ambitious Anglo-American Arctic expedition of 1906–7 achieved relatively little real polar work except a journey from March to May 1907 by E. de K. Leffingwell, E. Mikkelsen, and S. Storkersen from the coast in long. 149° W. across the sea ice to lat. 72° 3' N., long. 149° 44' W. where they got a sounding of no bottom in 620 fathoms. V. Stefansson, who was nominally a member of the expedition, spent his time with the Eskimo in the Mackenzie delta, learning their habits and language in order to equip himself for future explorations. ”
