This recent New York Times article on Mark Twain's Hawai'i is an interesting read:
[…] Twain spent four months in the islands in 1866, when he was 31 and working on becoming famous. His 25 letters from the Sandwich Islands, written on assignment for The Sacramento Union, are still fresh and rudely funny after almost a century and a half — a foretaste of genius and the best travel writing about Hawaii, my home state, I have ever read. […]