In some places the hind wheels are taken off, and sledge runners are fitted to the hind axletree. This is an excellent plan; it has the further advantage that the wagon settles down into a more horizontal position than before. I have seen timber carried on a wagon down a steep hill by separating the front wheels from the hind ones, lashing a trail (see "Travail" below) or two short poles to the fore axletree, and resting one end of the timber on the hind axletree, and the other end on the trail.
Shoe the wheel on the side furthest from the precipice.
If you have to leave a cart or wagon untended for a while, lock the wheel.
Sledges.--When carrying wood or stones, and doing other heavy work, a traveller should spare his wagon and use a sledge. This is made by cutting down a forked tree, lopping off its branches, and shaping it a little with an axe. If necessary, a few bars may be fixed across the fork so as to make a stage. Great distances may be traversed by one of these rude affairs, if the country is not very stony. Should it capsize, no great harm is done; and if it breaks down, or is found to have been badly made, an hour's labour will suffice to construct another. Sledges are very useful where there is an abundance of horse or ox power, but no wagon or packing-gear.
North American Travail.--In a North American Indian horse "travail," the crossing of the poles (they are the poles of the wigwams) usually rests on a rough pack-saddle or pad, which a breast-strap keeps from slipping backwards. In a dog travail the cross of the poles rests on the back of the neck, and is kept in place by a breast or rather a neck strap; the poles are wrapped with pieces of buffalo robe where they press against the dog. Captain Blakiston--a very accurate authority--considers that a horse will travel 30 miles in the day, dragging on the travail a weight of about 200 lbs., including a child, whose mother sits on the horse's back; and that a dog, the size of an average retriever, will draw about 80 lbs. for the same distance. (N.B. The North American plains are perfectly level.)
Palanquins, carried like sedan-chairs, between two animals--one going before the other in shafts--are in use in various countries; but I am not aware that explorers have ever properly tried them. Their advantage would lie in combining the convenience of a cart with much of the independence of pack-horses. For whatever is lashed on a pack-saddle must be securely tied up; it is therefore severely compressed, and cannot be taken out en route. But with a cart or a palanquin there is no such inconvenience: things may be quickly thrown into them or taken out; pockets and drawers may be fitted up; and the palanquin would afford some shelter in rain. I should think it would be well worth while to try one of these contrivances. It might be made en route; first accustoming the animals, when carrying their packs, to walk between long shafts, then, after some days, taking the load off their saddles, and lashing them on to the shafts. If all went well, a regular palanquin might be constructed with legs, to be let down when the animals are off-packed, and on which it might stand until ready to be again carried onwards. Half-a-dozen palanquins in file would make a pretty, and, I should think, a manageable and effective caravan. Asses ought to be able to carry them well; a couple of asses would probably carry a greater weight than a single pack-horse, and would give no greater trouble; if so, their hardiness would be invaluable.