_Author of the_ NANCY DREW MYSTERY STORIES Impetuous, delightful Jean Dana and her charming serious minded sister Louise find themselves in the midst of several mysteries, when they attempt to aid people who are in trouble. Thrilling moments come to the girls as they follow up clue after clue in an endeavor to untangle the knotty problems in which they become enmeshed. BY THE LIGHT OF THE STUDY LAMP A stolen study lamp, a fortune teller, and a distressed schoolmate provide plenty of excitement for the Dana girls before they locate the persons responsible for many mysterious happenings. THE SECRET AT LONE TREE COTTAGE While the girls are at Starhurst School, they learn that their beloved English teacher has vanished in a strange manner. In tracing her, Jean and Louise are able to aid the frantic relatives of a dear little curly-haired tot, but not before they themselves are in danger of disappearing. IN THE SHADOW OF THE TOWER The mingling of unusual characters, who have life interests very different from one another, lends excitement and intrigue to a Christmas vacation of the Dana girls. Their ability to fit together the pieces of a strange puzzle brings happiness to several persons! A THREE-CORNERED MYSTERY There were three strange corners which the Dana girls successfully rounded in their search for clues to clear up a mystery, involving property and an international spy of many aliases. THE SECRET AT THE HERMITAGE When Louise is mistaken for a runaway prisoner, strange things begin to happen, which lead the Danas to uncover the secret of a talented girl and her crippled charge. GROSSET & DUNLAP, Publishers, NEW YORK