Criminal Rattler Riggs fires a gun into a circus audience of young orphans, a rather shocking act in a funny animal book. (Note by Tom Lammers)
Tubby dreams he meets Italian navigator Christopher Columbus (1451-1506).
In New York, he points out the Chrysler Building and the Empire State Building, "where they publish Terry-Toons magazines!"
Tubby's own boat is the "S.S. Paratus," an allusion to the U.S. Coast Guard motto, Semper Paratus.
(Notes by Tom Lammers)