CUTTING AND FITTING TOPMAST RIGGING.--For the forward shroud, measure from the hounds of the topmast down to the after part of the lower trestle-trees, and add to that length half the circumference of the mast-head at the hounds. The eye is once and a quarter the circumference of the mast-head. The topmast rigging in size should be three fifths of the lower rigging. For the topmast backstays, measure the distance from the hounds of the mast down to the centre of the deck, abreast of their dead-eyes in the channels, and add to this length one half the circumference of the mast-head. Add to the length of the larboard pair, which goes on last, twice the diameter of the rope. The size of the fore and main topmast backstays is generally one quarter less than that of the lower rigging; and that of the mizzen topmast backstays the same as that of the main topmast rigging. The size of the topmast stays should be once and a quarter that of the rigging. The topmast rigging is fitted in the same manner as the lower. The backstays should be leathered in the wake of the tops and lower yards. The breast-backstays are turned in upon blocks instead of dead-eyes, and set up with a luff purchase. The fore topmast stay sets up on the starboard, and the spring stay on the larboard side of the bowsprit. All the fore-and-aft stays are now set up on their ends, and should be leathered in their nips, as well as in their eyes. The main topmast stay goes through a heart or thimble at the foremast-head, or through a hole in the cap, and sets up on deck or in the top; and the mizzen topmast stay sets up at the mainmast-head, above the rigging. JIB, TOPGALLANT, AND ROYAL RIGGING.--The jib stay sets up on its end on the larboard side of the head, and is served ten feet from the boom, and its collar is leathered like that of the topmast stay. The gaub lines or back ropes go from the martingale in-board. The guys are fitted in pairs, rove through straps or snatches on the spritsail yard, and set up to eye-bolts inside of or abaft the cat-heads. The foot-ropes are three quarters the length of the whole boom, and go over the boom-end with a cut splice. Overhand knots or Turks-heads should be taken in them at equal distances, to prevent the men from slipping, when laying out upon them.