Looking for information, especially the burial site, for John Alexander, who served as Captain of Co. A, 81st Pa. during the Civil War. Was born about 1817. Wife's name was Mary. She is listed 0n the 1890 Veterans Census living in Philadelphia. He had already died. Believe they were both living in Philadelphia before he died. Researching the men of the 81st Pa., and compiling their burial locations. Any help, or information would be greatly appreciated.