The Martin anchor and the Smith both work on a different principle from any of the others, in that their arms move together so as to allow both flukes to act at the same time. Of the two the Smith, which has no stock, is preferable for yacht work. The Martin has a stock which is fixed on the same plane with the arms. Both anchors catch quickly and hold well as long as the bottom is not rocky or very uneven, when they are apt to get tilted over and lose any hold they may have at first obtained. Their worst failing is that of coming home under the following conditions. If the yacht yaws about, owing to strong tides, winds, or boisterous weather, the flukes of the anchor are prone, when working in their holes, to make them so large that they gradually meet each other and finally become one big hole; the anchor then invariably trips, comes home, and the yacht drags. On the other hand, the Smith and Martin anchors stow away better than any others, and when on deck lie flat and compact. The Smith anchor makes a capital kedge. Its holding power is so great that it is not necessary to carry one of anything like the weight that would be required were any other patent anchor employed. The great point in favour of Smith's over that of Martin's anchor is that, should it foul a mooring or warp, it can be easily tripped. The tripping is done by letting the bight of a bowline slip down the chain and anchor till it reaches the arms, and then hauling on it. The best of the patents, however, is an anchor that was brought out some years ago by Messrs. Thomas & Nicholson, of Southampton and Gosport. It can be stowed away in a very small space, since the arms are removable. It is a quick catcher, and is, at the same time, very powerful and trustworthy. The arms stand out at the most effective angle for insuring strength of grip, while the shank is long, and, though light and neat-looking--it is flat-sided--has sufficient weight and substance in it to stand any ordinary crucial test. The flukes from their shape appear somewhat longer in proportion to their width than the usual patterns; but this arises from the sides being slightly bent back, with the object of making the fluke more penetrating, which it certainly is.