In this article, the author describes his research on the 19th century German-American printer Charles Magnus, who was active from 1850 until his death in 1900. Magnus produced a wide variety of ephemera including books, maps, prints, and song sheets. Emphasis is given to the collection of Magnus' works at the Winterthur Museum, Garden, and Library, and the author's role in their preservation and study. Topics discussed include previous research on Magnus by historians including Helena Zinkham, Raymond Marsh, and George N. Malpass, Magnus' wife Christina Magnus, and a print by Magnus depicting the capture of Jefferson Davis, leader of the Confederate States of America.