[1][2][3] His father, James E. Cosgriff, was a native of Burlington, Vermont, who moved to Rawlins, Wyoming, in 1890 to raise 100,000 sheep.
[2] Shortly after his father's death in October 1938, he was appointed as a board member and first vice president of the First National Bank of Rawlins, Wyoming.
[2] By 1954, he owned banks in "Salt Lake City, Richfield and Bountiful, Utah; Colorado Springs, Meeker and Rifle, Colorado; Boise, Richfield, Whitney, New Plymouth, Caldwell, Wilder, Idaho Falls, Marsing, Homedale and Bruneau, Idaho; Beverly, Kansas; Las Vegas, Nevada; Long Beach, California, and Evanston, Wyoming".
[7] Cosgriff was appointed to the board of directors of the Reconstruction Finance Corporation by President Harry S. Truman in 1950.
[1] Cosgriff married Lula Enid Barr on June 7, 1937, in Salt Lake City, Utah.
[11] Barr was a philanthropist in Salt Lake City, where she co-founded Ballet West and supported Catholic charities; Pope John Paul II made her a Lady of the Order of the Holy Sepulchre.
[13] Shortly after his death, E. Parry Thomas succeeded Cosgriff as the president of the Bank of Las Vegas.