"It was written, as you well know," said I, "for the instruction and amusement of my children, but it is very possible that it may be useful to other young people, more especially to boys. "Children are, on the whole, very much alike everywhere, and you four lads fairly represent multitudes, who are growing up in all directions. It will make me happy to think that my simple narrative may lead some of these to observe how blessed are the results of patient continuance in well-doing, what benefits arise from the thoughtful application of knowledge and science, and how good and pleasant a thing it is when brethren dwell together in unity, under the eye of parental love." * * * * * Night has closed around me. For the last time my united family slumbers beneath my care. To-morrow this closing chapter of my journey will pass into the hands of my eldest son. From afar I greet thee, Europe! I greet thee, dear old Switzerland! Like thee, may New Switzerland flourish and prosper--good, happy, and free! THE END. HAL KEEN MYSTERY STORIES By HUGH LLOYD Boys! Meet Hal Keen, that lanky, nonchalant, redheaded youth whose guiding star is the star that points to adventure, excitement and mystery. Follow him in his hunts for clues and criminals. There are plenty of thrills and shivers in these stories to keep you on your toes. THE SMUGGLER'S SECRET Hal Keen sets out to get to the bottom of a mystery that threatens the safety of a whole community. THE MYSTERIOUS ARAB Mystery, excitement, murder in a scientist's camp in the jungles of Africa, where hate, revenge, and suspicion lead to tragedy. THE HERMIT OF GORDON'S CREEK The disappearance of two airmail pilots leads to a mystery that centers about an abandoned mine and a strange old man. KIDNAPPED IN THE JUNGLE A hint of buried treasure in the ruins of an old French mission leads Hal deep into the Central American jungle. THE COPPERHEAD TRAIL MYSTERY Baffling and blood-curdling events center about the ranch where Hal Keen and his friends had gone in search of gold. THE LONESOME SWAMP MYSTERY The lonely and mysterious swamp gave up its secret only after a series of terrifying events taxed Hal's courage and ability. THE CLUE AT SKELETON ROCKS In this new thriller Hal Keen finds mystery and adventure in and about a lonely lighthouse on Skeleton Rocks, off the Maine coast. THE DOOM OF STARK HOUSE Mystery and terror in an old house in the wilderness above Quebec where Hal Keen is the guest of a strange family. GROSSET & DUNLAP, PUBLISHERS, NEW YORK ADVENTURES _in the_ UNKNOWN By CARL H. CLAUDY Weird! Mysterious! Incredible! Astounding!