2. THE STRANGE ECHO
Lost Lake had two mysteries—an old one and a new one. Kay, visiting there, solves both of them by deciphering a strange echo.
3. THE MYSTERY OF THE SWAYING CURTAINS
Heavy draperies swaying in a lonely mansion give the clue which is needed to solve a mystery that has defied professional investigators but proves to be fun for the attractive and clever Kay Tracey.
4. THE SHADOW ON THE DOOR
Was the shadow on the door made by a human being or an animal? Apparently without explanation Kay Tracey, after some exciting work solved the mystery and was able to help a small child out of an unfortunate situation.
CUPPLES & LEON COMPANY, Publishers NEW YORK
THE BETTY GORDON SERIES
By ALICE B. EMERSON