Born in Monte Vista, Colorado. Married to Catherine with a son and daughter. Employed as an electrical engineer with Eastman Kodak Company and Stromberg Carlson. He retired about 1950.

He was a founder of the Empire State Numismatic Association. Foster served as president of the Rochester Numismatic Association in 1934. The RNA honored him with their annual medal. He was life member number 170 of the ANA. He served as Librarian and Curator of the ANA 1931 to 1937.

He conducted two auctions in Rushville, New York, in 1949 and 1956. The 1949 sale was the first to use the Sheldon gradings cale.

Author of Historical Arrangement of United States Commemorative Coins in 1936.

Foster collected Lesher dollars. They were included in the Federal Coin Exchange auction October 13, 1956.

obit: NUM 73 Jun 1960 pages 701-702 SSDI:N/A