From "The Blue Book of Chess":
"Concerning the Knight.—The Knight is at once the most striking and most beautiful of all the Pieces. The singularity of its evolutions, by which it is enabled to overleap the other men and wind its way into the penetralia of the adverse ranks, and if attacked leap back again within the boundary of its own, has rendered it the favorite Piece of leading players in every country."
"At the commencement of a game, the best place for the King's Knight is at K. B's 3d sq.; it there attacks your adversary's K's Pawn, if it has been moved two squares, and offers no impediment to the playing out your King's Bishop, and prevents the adversary from placing his Queen on your King Rook's 4th sq., where she would often be a source of restraint and danger to your King. Many persons prefer playing the K. Kt. to K's 2d at the second move, from the mistaken notion that the K. B's P.should be moved before the Knight is played to B's 3d; this is an error, and generally leads to a very bad game."
"When you have brought out your Q. Kt. to B's 3d, it is frequently advisable, at a proper opportunity, to get him round by K's 2d sq. to the K. Kt's 3d, where he exercises a very important influence, by threatening, whenever the square is left unguarded, to post himself on K. B's 5th."