 Savoldi spoke Italian in several dialects as well as French, Spanish, and some German, and his dangerous work behind enemy lines was highly regarded according to several, now declassified, documents.The 1946 book "Cloak and Dagger" by Alastair MacBain and Corey Ford includes an entire chapter titled "The Saga of Jumping Joe", recounting Savoldi's participation in the McGregor Project.The book was later adapted to film under the same title, "Cloak and Dagger" starring Gary Cooper.