October 5, 1879, Chicago, Illinois.
Elderkin married Mary Willard of Elmira, New York, in 1869; the marriage record said he was from Camillers, New York.
The two were living in Cook County, Illinois, in 1900 & 1910. By 1912, he was in Princeton, New Jersey, where he was an assistant professor and preceptor in art and archaeology at Princeton University. He was in Princeton until at least 1942. His works include: