There is a Roots List called "Books We Own". One of the books I listed was on people who took the Oath right after the war. There are many Hessians listed, as "So and so, former Hessian from ___, now of Philadelphia (or Lancaster Co. or wherever)," often his wife's name, and the date of the Oath. If you go to the site, there are lots of books, and people who are willing to do lookups for you at no cost. The form to use is on the site. Ingrid