"The German Regiment of Maryland and Pennsylvania " by Henry J. Retzer (1991) revised 1996 should be available at Willow Bend Books, Westminster, MD. I have the phone number under the name of their predecessor Family Line Publications who originally published the book, but Willow Bend is at the same locale. (410) 876-6101 If it is no longer available you can contact me for a look up. Anne W. Cissel Historic Research Associates