Another Scottish-American mystery adventure, this time involving the theft of the fabulous jewel of the Glangow Provost. Twelve-year-old Walter Macfadyen, orphan nephew of a New York detective, decides to prove his self-sufficiency and thereby induce his uncle to take his brother and sister as well as himself to America. Some misadventures in his efforts to trail two American jewel thieves lead him to Glasgow where he attempts to forestall the theft of the beautiful jewel belonging to the Provost, in whose house he is living. Suspense, some lucky incidents and a breathless chase trap the thieves, and Walter wins assurance that his dream will come true. The improbability is well balanced by excitement and Walter's canny ways.