The Hornet disaster was fully told in his letter of June 27th. The survivors were brought to Honolulu, and with the assistance of the Burlingame party, Clemens, laid up with saddle boils, was carried on a stretcher to the hospital, where, aided by Burlingame, he interviewed the shipwrecked men, securing material for the most important piece of serious writing he had thus far performed. Letter No. 15 to the Union--of date June 25th--occupied the most of the first page in the issue of July 19. It was a detailed account of the sufferings of officers and crew, as given by the third officer and members of the crew. From letter No. 15: In the postscript of a letter which I wrote two or three days ago, and sent by the ship “Live Yankee,” I gave you the substance of a letter received here from Hilo, by Walker Allen and Co., informing them that a boat, containing fifteen men in a helpless and starving condition, had drifted ashore at Sanpahoe, Island of Hawaii, and that they had belonged to the clipper ship “Hornet”--Cap. Mitchell, master--had been afloat since the burning of that vessel, about one hundred miles north of the equator, on the third of May--forty-three days. The Third Mate, and ten of the seamen have arrived here, and are now in the hospital. Cap. Mitchell, one seaman named Antonio Passene, and two passengers, Samuel and Henry Ferguson, of New York City, eighteen and twenty-eight years, are still at Hilo, but are expected here within the week. In the Captain's modest epitome of the terrible romance you detect the fine old hero through it. It reads like Grant. Here follows the whole terrible narrative, which has since been published in more substantial form, and has been recognized as literature. It occupied three and a half columns on the front page of the Union, and, of course, constituted a great beat for that paper--a fact which they appreciated to the extent of one hundred dollars the column upon the writer's return from the islands. In letters Nos. 14. and 15. he gives further particulars of the month of mourning for the princess, and funeral ceremonials. He refers to Burlingame, who was still in the islands. The remaining letters are unimportant. The Hawaiian episode in Mark Twain's life was one of those spots that seemed to him always filled with sunlight. From beginning to end it had been a long luminous dream; in the next letter, written on the homeward-bound ship, becalmed under a cloudless sky, we realize the fitting end of the experience. To Mrs. Jane Clemens and Mrs. Moffett, in St. Louis: ON BOARD SHIP Smyrniote, AT SEA, July 30, 1866.