of jewel and manuscript, it would be beyond belief. For, while the famous Cullinan Diamond was far larger in the rough, there is no credible record of any cut stone weighing even half as much. Dealers, skeptical of its description and astonished by its reality, have been reluctant to set any valuation upon it. "By the carat, millions!" cried one startled jeweler. "But I should cut up such a stone, like a cheese, never! Vait for some prince to giff his kingdom!" We have hesitated, despite the request in the unfinished will, to publish this manuscript, especially since so large a part of the mystery is still unsolved. For it is sure to be received with skepticism in the scientific world, and its acceptance elsewhere may endanger the safety of the diamond. But all other efforts to find Barry Horn's attorney and his son have failed. Publication holds the only remaining hope of clearing up the mystery and establishing the ownership of the jewel. Any person knowing the whereabouts of the younger Barry Horn, or the identity of his father's attorney, is requested to communicate immediately with the publishers. I The Rocket Astronaut The Rocket Astronaut "Mought dis be of int'rest to yuh, suh?" The advertisement was pointed out to me by a friendly elevator operator at the Explorer's Club. Placed in the classified columns of the New York Standard, for October 8, 1938, it ran: WANTED: Vigorous man, with training and experience in scientific exploration, to undertake dangerous and unusual assignment. Apply in person, this evening, 6 to 10. Dr. Hilaire Crosno, Hotel Crichton. That sounded good. I had been in New York just twice too long. Always, when I had come back from the long solitudes of desert or jungle, the first fortnight on Broadway was a promised paradise, and the second began to be hell. I gave the grinning boy a dollar, stuffed an envelope with credentials, downed another stiff peg of whiskey, and walked into the glittering chromium lobby on the stroke of six. My inquiry for Dr. Crosno worked magic on the supercilious clerk. Crosno proved to be a big man, with huge bald head and deep-sunken, dark, magnetic eyes. The tension of his mouth hinted of some hidden strain, and extreme pallor suggested that, physically,