On-sale date from Comic Reader #79 and from copyright registration.
Story in four chapters: Chapter One: Mystery of the Mansion! (11 pp.); Chapter Two: Who Is Walking on My Grave? (8 pp.); Chapter Three: The Body in the Garden (8 pp.); and Chapter Four: The Hidden Room (9 pp.).
Letters submitted by Roberta Remsen; Mrs. G. L.; P. Stafford; Paul Dempsey; Elizabeth Cramer; John D. Warner. Writer's credit from Robin Snyder.