5. BILLIE BRADLEY AT TWIN LAKES
or Jolly Schoolgirls Afloat and Ashore
A tale of the out-of-doors, in which Billie and her chums during their visit to an artists' colony become acquainted.
6. BILLIE BRADLEY AT TREASURE COVE
or The Old Sailor's Secret
How Billie Bradley heard of the Treasure, and how the girls meet with excitement, adventures, and strange characters in their endeavor to discover the old sailor's secret.
7. BILLIE BRADLEY AT SUN DIAL LODGE
or School Chums Solving a Mystery
The recovery of a stolen treasure chest forms the groundwork of an exciting story, that reveals Billie's ability at unraveling a mystery.
8. BILLIE BRADLEY AND THE SCHOOL MYSTERY