A native of Stockholm, Sweden, Theodore Valenkamph became an East Coast marine painter.  He emigrated to the United States and settled in Gloucester, Massachusetts in 1899.

By 1903, he had a studio in Boston on Tremont Street in the Studio Building, and by 1909 had moved to Rocky Neck Avenue in East Gloucester.

Source: Peter Hastings Falk (ed.), Who Was Who in American Art