Casco Bay
The Casco Bay Steamboat Company began providing permanent year-round service to Casco Bay Islands in 1878. In 1881 the Harpswell Line began providing regular service to the outer bay islands. The lines merged in 1907 as the Casco Bay and Harpswell Steamboat Company. The company shut down in July 1919 as a direct result of World War I. A smaller company named Casco Bay Lines was formed that winter.