Produced by David Edwards and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from scans of public domain material produced by Microsoft for their Live Search Books site.) [Illustration: IT WAS EXCITING TO BRING THE ROWBOAT THROUGH THE PASSAGE. THE ROVER BOYS ON TREASURE ISLE OR _THE STRANGE CRUISE OF THE STEAM YACHT_ BY ARTHUR M. WINFIELD (Edward Stratemeyer) AUTHOR OF THE ROVER BOYS AT SCHOOL, THE ROVER BOYS ON THE OCEAN, THE PUTNAM HALL SERIES, ETC. _ILLUSTRATED_ NEW YORK GROSSET & DUNLAP PUBLISHERS Made in the United States of America BOOKS BY ARTHUR M. WINFIELD (Edward Stratemeyer) THE FIRST ROVER BOYS SERIES THE ROVER BOYS AT SCHOOL THE ROVER BOYS ON THE OCEAN THE ROVER BOYS IN THE JUNGLE THE ROVER BOYS OUT WEST THE ROVER BOYS ON THE GREAT LAKES THE ROVER BOYS IN THE MOUNTAINS THE ROVER BOYS IN CAMP THE ROVER BOYS ON LAND AND SEA THE ROVER BOYS ON THE RIVER THE ROVER BOYS ON THE PLAINS THE ROVER BOYS IN SOUTHERN WATERS THE ROVER BOYS ON THE FARM THE ROVER BOYS ON TREASURE ISLE THE ROVER BOYS AT COLLEGE THE ROVER BOYS DOWN EAST THE ROVER BOYS IN THE AIR THE ROVER BOYS IN NEW YORK THE ROVER BOYS IN ALASKA THE ROVER BOYS IN BUSINESS THE ROVER BOYS ON A TOUR THE SECOND ROVER BOYS SERIES THE ROVER BOYS AT COLBY HALL THE PUTNAM HALL SERIES THE PUTNAM HALL CADETS THE PUTNAM HALL RIVALS THE PUTNAM HALL CHAMPIONS THE PUTNAM HALL REBELLION THE PUTNAM HALL ENCAMPMENT THE PUTNAM HALL MYSTERY 12mo. Cloth. Illustrated. GROSSET & DUNLAP, Publishers, New York COPYRIGHT, 1909, BY EDWARD STRATEMEYER _The Rover Boys on Treasure Isle_ INTRODUCTION. 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.