"The Motor Girls on Crystal Bay The Secret of the Red Oar "

Volumes 1 through 11 of the Dorothy Dale series were ghostwritten by Lilian Garis, volumes 9 through 12 by W. Bert Foster, and volumes 13 by Elizabeth Duffield Ward. A few series written by Cupples & Leon under the alias "Margaret Penrose" are published by the Stratemeyer Syndicate. The Dorothy Dale series (1908-1924), the Syndicate's first lengthy series featuring a female protagonist, was the first to utilize this name. The Motor Girls series (1910-1917), a rival to the popular Motor Boys series (1906-1924), also took the moniker in response to this success. The latest new series to bear this moniker was the Radio Girls series (1922-1923). In 1930, the show was converted into a Campfire Girls series after being sold to Goldsmith. The Burglar's Daughter was one "Margaret Penrose"-an authored book that was not a Stratemeyer Syndicate publication (Jordan, Marsh, 1899). It was a coincidence that both pen names were from the Syndicate.