As for the quality of the letter, Kerouac described it this way: “It was the greatest piece of writing I ever saw, better’n anybody in America, or at least enough to make Melville, Twain, Dreiser, Wolfe, I dunno who, spin in their graves.”
via Letter That Inspired Kerouac’s ‘On the Road’ Found – ABC News
I hope I get a chance to read it.