Black and white image of officials from the Six Companies of San Francisco and the Bureau of Reclamation, as well as some local individuals, signing the contract to construct Hoover Dam (note: Boulder Dam was officially renamed Hoover Dam in 1947). Henry J. Kaiser is seated, signing the contract. Standing at the second spot from the left is Al Cahlan, Las Vegas Review Journal Managing Editor. Standing at the far right is Charles P. "Pop" Squires. Also identified in the photograph (in no particular order) are W.R. Armstrong, Walker J. Young (Bureau of Reclamation Engineer), R.F. Walter, and Louis Crampton.
Black and white image of a machine from Death Valley that was possibly named Dinah and was later brought to El Dorado Canyon in Nevada. Two men are standing in front of the machine; the man on the right is Robert E. Lake.
Black and white image of the Lake family in Ontario, Canada. Standing in the back, from left to right: Clifford Lake, Claude Lake. Seated, from left to right: Olive Lake, Mary Ellen Lake (mother), Alice Lake, and Robert Elonzo Lake (father). Ernest Lake and Thomas Lake are sitting in front.