I am Amos Silkworth's great grandson. I have quite a number of his photographs, and remember his studio logo from my childhood. Amos Jr. married Mary Biffar in 1985. Mary's father Henry Biffar originated the photography studio, so we can assume that the Silkworth name did not appear independently until after that date. By the turn of the century it seems that Amos had earned his fortune in the photography business and retired to Mattituck, N.Y.