I would like to learn if employee records still exist for the company that produced 'The Monitor' in 1862--Continental Iron Works in Greenpoint, Brooklyn. My great grandfather was a shipwright and family stories tell that he 'worked on' The Monitor. Illustrations show it sliding down the ways in Greenpoint, Brooklyn where he [Amos Silkworth] was an employee. I have a receipt signed by him for materials billed to the Schooner Eagle, but there is no heading on the receipt. Where to look--NY State, Brooklyn or Maritime records, and after learning that, where would such records be located? Thanks in advance--Jan