The character of American humor, and its want of resemblance to the humor of Kamtschatka and Patagonia,-will the reader forgive us if we fail to set down here the thoughts suggested by these fresh and apposite topics? Will he credit us with a self-denial proportioned to the vastness of Mr. Clements's very amusing book, if we spare to state why he is so droll, or-which is as much to the purpose-why we do not know? This reticence will leave us very little to say by way of analysis; and, indeed, there is very little to say of "The Innocents Abroad" which is not of the most obvious and easy description. The idea of a steamer-load of Americans going on a prolonged picnic to Europe and the Holy Land is itself almost sufficiently delightful, and it is perhaps praise enough for the author to add that it suffers nothing from his handling. If one considers the fun of making a volume of six hundred octavo pages upon this subject, in compliance with one of the main conditions of a subscription book's success, bigness namely, one has a tolerably fair piece of humor, without troubling Mr. Clements further. It is out of the bounty and abundance of his own nature that he is as amusing in the execution as in the conception of his work. And it is always good-humored humor, too, that he lavishes on his reader, and even in its impudence it is charming; we do not remember where it is indulged at the cost of the weak or helpless side, or where it is insolent, with all its sauciness and irreverence. The standard shams of travel which everybody sees through suffer possibly more than they ought, but not so much as they might; and one readily forgives the harsh treatment of them in consideration of the novel piece of justice done on such a traveller as suffers under the pseudonyme of Grimes. It is impossible also that the quality of humor should not sometimes be strained in the course of so long a narrative; but the wonder is rather in the fact that it is strained so seldom.