He became a specialist in marine molluscs.[1] He was extremely devoted to his science and was well known as a shell show judge in many parts of the United States.[1] He went on several expeditions including ones to the Galapagos and Mexico.[1]
Raeihle D. & Emerson W. K. (1983). "In memorium: William Erwood Old Jr., April 14, 1928 - December 31, 1982". American Malacological Bulletin1: 75–78.
Raeihle D. & Emerson W. K. (1983). "William Erwood Old Jr. 1928-1982". Of Sea & Shore13(1): 41-42 [reprinted from New York Shell Club Notes, no. 286, Mar 1983]