Nos. 1 and 2 on their respective sides then lift the axle while the gunner removes the wheels and replaces linch-pins and washers; Nos. 1 and 2 fasten them together with wheel-strap, dish of wheels inside, and place them astride of gun, hubs between wheel-pads on cargo-cincha, lower them to their proper position, and suspend them with the hub-strap which passes around the hubs and over top of gun. On most animals the best position for wheels is to have the distance from bottom of hub, measured over top of saddle, 36 inches. Nos. 1 and 2 then buckle around the rim of wheel, on their respective sides, the two wheel-straps, which are attached to the belly-cincha chape, two spokes apart on each side, and tighten these straps until the wheels are in the best position and bear firmly on the cargo-cincha wheel-pads, and on the gun-pad. The wheel-pack is then secure and can be easily adjusted from time to time to aid the animal on the march. If further security is required, lash the wheels with the lashing-rope; fasten one end of rope to one hub, pass it around wheels, under corners of saddle-pads and over and under the animal, and draw tight. (The most expert packer of the detachment should be required to perform the duties pertaining to that work when necessary, as it is very important that the work should be done properly.) SECOND ANIMAL. (See Fig. 11.) =Carriage and Harness.=--No. 3 leads the carriage-mule up and places him three yards in front of muzzle, facing to the front. No. 1 places harness (in its sack) on left side with pole-yoke under flap of harness-sack, and secures them in position with the two straps which are attached to the saddle. No. 2 places pole (butt end in front) and splinter-bar on right side and secures them in position with the two straps which are attached to the saddle, passing the straps twice around the pole and bar. The front strap passes once in front and once in rear of the pintle-pin. The gunner at the trail and Nos. 1 and 2 at the axle lift the carriage and place it in position on top of saddle, bottom down, trail to the rear, so that special shapes of saddle arch-irons will engage in the carriage. The front arch-iron enters the slot just in rear of carriage-axle. [Illustration: FIG. 11.] The gunner passes the cargo-cincha over the carriage, the wooden block down, and in between side flanges of trail, elevating-screw passing through hole in cincha and wooden block; then receives from No. 1 the ammunition-pack and places it in position; cinches securely, fastens the primer-pouch and haversack containing accessories around gun-carriage cheek, and this pack is complete. NOTE.--The harness, pole-yoke, and splinter-bar are not necessary to this pack, and the carriage packs equally well without them. If _on_ the saddle, they are to be left on it in coming into action; that is, the carriage can be unpacked and repacked without disturbing them.