One can laugh very heartily, now, at all this; but nearly everybody, the gravest and the wisest, too, was completely taken in at the time: and the "Sun," then established at the corner of Spruce street, where the "Tribune" office now stands, reaped an increase of more than fifty thousand to its circulation--in fact, there gained the foundation of its subsequent prolonged success. Its proprietors sold no less than $25,000 worth of the "Moon Hoax" over the counter, even exhausting an edition of sixty thousand in pamphlet form. And who was the author? A literary gentleman, who has devoted very many years of his life to mathematical and astronomical studies, and was at the time connected as an editor with the "Sun"--one whose name has since been widely known in literature and politics--Richard Adams Locke, Esq., then in his youth, and now in the decline of years. Mr. Locke, who still survives, is a native of the British Isles, and, at the time of his first connection with the New York press, was the only short-hand reporter in this city, where he laid the basis of a competency he now enjoys. Mr. Locke declares that his original object in writing the Moon story was to satirize some of the extravagances of Doctor Dick, and to make some astronomical suggestions which he felt diffident about offering seriously. Whatever may have been his object, his hit was unrivaled; and for months the press of Christendom, but far more in Europe than here, teemed with it, until Sir John Herschel was actually compelled to come out with a denial over his own signature. In the meantime, it was printed and published in many languages, with superb illustrations. Mr. Endicott, the celebrated lithographer, some years ago had in his possession a splendid series of engravings, of extra folio size, got up in Italy, in the highest style of art, and illustrating the "Moon Hoax." Here, in New York, the public were, for a long time, divided on the subject, the vast majority believing, and a few grumpy customers rejecting the story. One day, Mr. Locke was introduced by a mutual friend at the door of the "Sun" office to a very grave old orthodox Quaker, who, in the calmest manner, went on to tell him all about the embarkation of Herschel's apparatus at London, where he had seen it with his own eyes. Of course, Locke's optics expanded somewhat while he listened to this remarkable statement, but he wisely kept his own counsel.