The letters began in the Union with the issue of April the 16th, 1866. The first--of date March 18th--tells of the writer's arrival at Honolulu. The humor in it is not always of a high order; it would hardly pass for humor today at all. That the same man who wrote the Hawaiian letters in 1866 (he was then over thirty years old) could, two years later, have written that marvelous book, the Innocents Abroad, is a phenomenon in literary development. The Hawaiian letters, however, do show the transition stage between the rough elemental humor of the Comstock and the refined and subtle style which flowered in the Innocents Abroad. Certainly Mark Twain's genius was finding itself, and his association with the refined and cultured personality of Anson Burlingame undoubtedly aided in that discovery. Burlingame pointed out his faults to him, and directed him to a better way. No more than that was needed at such a time to bring about a transformation. The Sandwich Islands letters, however, must have been precisely adapted to their audience--a little more refined than the log Comstock, a little less subtle than the Atlantic public--and they added materially to his Coast prestige. But let us consider a sample extract from the first Sandwich Islands letter: Our little band of passengers were as well and thoughtfully cared for by the friends they left weeping upon the wharf, as ever were any similar body of pilgrims. The traveling outfit conferred upon me began with a naval uniform, continued with a case of wine, a small assortment of medicinal liquors and brandy, several boxes of cigars, a bunch of matches, a fine-toothed comb, and a cake of soap, and ended with a pair of socks. (N. B. I gave the soap to Brown, who bit into it, and then. shook his head and said that, as a general thing, he liked to prospect curious, foreign dishes, and find out what they were made of, but he couldn't go that, and threw it overboard.) It is nearly impossible to imagine humor in this extract, yet it is a fair sample of the entire letter. He improves in his next, at least, in description, and gives us a picture of the crater. In this letter, also, he writes well and seriously, in a prophetic strain, of the great trade that is to be established between San Francisco and Hawaii, and argues for a line of steamers between the ports, in order that the islands might be populated by Americans, by which course European trade in that direction could be superseded. But the humor in this letter, such as it is, would scarcely provoke a smile to-day. As the letters continue, he still urges the fostering of the island trade by the United States, finds himself impressed by the work of the missionaries, who have converted cannibals to Christians, and gives picturesque bits of the life and scenery.