My DEAR Boys: This is a complete tale in itself, but forms the thirteenth volume of the "Rover Boys Series for Young Americans." This line of books was started some ten years ago with the publication of the first three volumes, "The Rover Boys at School ... .. The Rover Boys on the Ocean" and "The Rover Boys in the Jungle." At that time I thought to end the series with a fourth volume provided the readers wanted another. But with the publication of "The Rover Boys Out West," came a cry for "more!" and so I added "On the Great Lakes," "In the Mountains," "In Camp," "On Land and Sea," "On the River," "On the Plains," "In Southern Waters" and "On the Farm," where we last left our friends.…
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