David Leslie Wishart was born on 15 February 1892 in Setauket, New York. He was the elder of two boys of a grocer from Kincardineshire named Andrew, and his wife, Amanda Hawkins. By 1900 the family had moved to Brookhaven in Suffolk County where David’s father worked as a postmaster and young David took up work on a local farm. In 1917 David was employed as a toolmaker with the Winchester Repeating Arms Company in New Haven, Connecticut and following America’s entry into the war, he enlisted in Setauket on 6 April 1918 and joined the United States Naval Reserve Force. Between 24 June and 11 November, he served as a machinist’s mate, 2nd Class at Section Base No.6 in Brooklyn, New York.
After the war, David returned to New Haven and took up his old job at the munitions factory and married Thelma Adele Brush on 9 June 1926 in Stony Brook, New York. A daughter was born shortly afterwards and the family took up residence back in Suffolk County. Following a period working for Swinerton, Hageman & Mcclure, David worked at Coco Solo in the Canal Zone near Colón, Panama where he was based at the time America entered WW2. Returning in 1943, David went back to New York, where he lived until his death on 23 November 1975. He is buried with Thelma in the Caroline Churchyard, Setauket.