The opportunity here offered [Footnote: By the appearance in England several years ago of an edition of the author's writings as then collected.] to give some account of the genesis of these Californian sketches, and the conditions under which they were conceived, is peculiarly tempting to an author who has been obliged to retain a decent professional reticence under a cloud of ingenious surmise, theory, and misinterpretation. He very gladly seizes...