We have a letter from a great uncle who served on the USS Onward and also on the USS Virginia and had a stay in Douglas Hospital. Can't find him listed anywhere. His name is Severt Salveson but one letter says to send letters to Sam Baker, US Ship Onward, Port Royal, South Carolina - Captain Nielsen. You'd think with that much information, I could find a reference. How do you find a sailor in the rosters? They all seem to be infantry or cavalry.