The cold stole into the boy’s bones, and his fingers were so weary that he could scarcely hold the hammer. He piled the fire high again, and went back to his work. But the strokes fell slowly now, and the beating of the hammer in the night was labored and irregular. The high-heaped fire sent its beacon gleam against the sky and showed the shadow of the boy, striving the long night through to bring the giant of the past to light. Chip!... Chip!... The hammer fell aimlessly. Ineffectively the boy made an attempt to raise it, but his fingers were nerveless. He swayed once, twice, then fell forward on his hands across the Titan, sunk in the sleep of exhaustion. As the dawn broke, three riders, at full speed, guided by the light of the fire, came dashing down the ravine, and the first rays of the rising sun showed them the boy asleep, pillowed on the outcrop of a Brachiosaurus, which later quarrying was to prove one of the finest of its kind. “Some paleontologist!” said the professor, and laid his overcoat over the sleeping boy. THE END U. S. SERVICE SERIES By FRANCIS ROLT-WHEELER Illustrations from photographs taken in work for U. S. Government Large 12mo Cloth $1.50 per volume “There are no better books for boys than Francis Rolt-Wheeler’s ‘U. S. Service Series.’”—_Chicago Record-Herald._ THE BOY WITH THE U. S. SURVEY [Illustration: book] This story describes the thrilling adventures of members of the U. S. Geological Survey, graphically woven into a stirring narrative that both pleases and instructs. The author enjoys an intimate acquaintance with the chiefs of the various bureaus in Washington, and is able to obtain at first hand the material for his books. “There is abundant charm and vigor in the narrative which is sure to please the boy readers and will do much toward stimulating their patriotism by making them alive to the needs of conservation of the vast resources of their country.”—_Chicago News._ THE BOY WITH THE U. S. FORESTERS THE life of a typical boy is followed in all its adventurous detail—the mighty representative of our country’s government, though young in years—a youthful monarch in a vast domain of forest. Replete with information, alive with adventure, and inciting patriotism at every step, this handsome book is one to be instantly appreciated. “It is a fascinating romance of real life in our country, and will prove a great pleasure and inspiration to the boys who read it.”—_The Continent, Chicago._ THE BOY WITH THE U. S. CENSUS THROUGH the experiences of a bright American boy, the author shows how the necessary information is gathered. The securing of this often involves hardship and peril, requiring journeys by dog-team in the frozen North and by launch in the alligator-filled Everglades of Florida, while the enumerator whose work lies among the dangerous criminal classes of the greater cities must take his life in his own hands.