An ISAAC TUTTLE is listed in Alvan M Tuttle's TUTTLE/TUTHILL LINES IN AMERICA on pg 273 as born Wantage, NJ on 13 March 1820 and states he served in Civil War in 139 Infantry from PA. Lists his wife as Elizabeth HOUGH and lists three children.. Perhaps this is your Isaac -- If the reference is not available in your library it is availabe on microfilm from the LDS Library in Salt Lake City though your local LDS Stake. Good luck in your search -- Hope this is your ISAAC Lou Tuttle