"The best overall reference on the U-Deutschland, including an appendix on U-Deutschland artifacts, is to be found in Dwight R. Messimer's The Baltimore Sabotage Cell: German Agents, American Traitors, and the U-Boat Deutschland during World War I, 2015, Naval Institute Press. Copies of this book are readily available online, and likely not expensive. There were a number of artifacts made from the ballast of the merchant submarine, and Mr Conway's appears to be one in very nice condition."

Thanks! Whatever it is, don't be surprised if someone's already written a book about it! -Editor

"Russ Sears published the story of the ballast medals in the Fall 2007 issue of the Maryland TAMS Journal."

Thanks! Russ' article mentions another book, Voyage of the Deutschland by Captain Paul Koenig. Published in 1915, the book is available in both English and German. -Editor

"I think Russ Sears may have gotten the publication year wrong for Koenig's book. The voyage was not made until 1916."

Correct - I checked, and it was published in 1916. -Editor