Billy Topsail, M.D.: A Tale of Adventure With Doctor Luke of Labrador by Norman Duncan (1871 - 1916)

The further adventures of Billy Topsail and Archie Armstrong on the ice, in the forest and at sea. In a singular manner the boys fall in with a doctor of the outposts and are moved to join forces with him. The doctor is Doctor Luke of the Labrador whose prototype as every one knows is Doctor Grenfell. Its pages are as crowded with brisk adventures as those of the preceding books. - Summary by Book Cover