Fresh reports, however, caused us much uncertainty whether the Falls of “Moambwa,” or the rocks, were not still below the station, and some time was therefore spent in exploring the river down to Sinamane’s Island, when, having ascertained that the rapids and other difficulties appeared not quite impracticable, we set up the bow and stern sections of one boat, connecting them by the ribbands of red deal we had been able to carry up, and fitting at short intervals a series of frames on central posts, as described at [p. 122], and further supported by shorter posts on either side, in a line with the gunwale streak, testing the accuracy of all parts where correctness was required with plumb line and level, and leaving the rest rough.
Our bench consisted of ten stakes, nearly 3ft. high, driven into the ground, and two long straight poles laid fore and aft in their forks; smaller poles were laid across these as closely as possible, and lashed with the inner bark of the young branches of the “kookomboyon”—a kind of stercuhia, which, while still moist, answers very well, but becomes brittle in drying. The large smith’s vice was firmly lashed to the stoutest upright with raw hide, and forked poles were set diagonally to resist the forward strain to which the bench was subject when wood was being planed up.
It was just possible to get thin poles that would bend, but none were sufficiently flexible to take the true curve required for the ribs, and at the same time strong enough to bear the strain when they became dry. Therefore we had to cut crooks out of the motchicheeries, the wood of which looked something like coarse short-grained cedar; and first burning away the light stuff from the tree cut down a month ago, we found a great many available forks and curves.
We had great difficulty in selecting wood of a suitable size for plank; trees too small, or too crooked, or of unsuitable wood, were in abundance; while those of the wood we wanted were mostly too large and unmanageable. Sometimes, at a distance, one would appear to be small enough, but when we came near it would prove three or four feet thick and sixty or eighty feet high, and had only seemed small by comparison with those around it. One group of motchicheeries had grown to maturity, throwing a wide-spread shadow around them; and a young sapling had shot straight up from near their roots towards the air and light; this was 9in. thick at the base, and 4in. at nearly 30ft. up; it proved impossible to “fall” the top outward, and it was very difficult to clear from the other trees. We would have saved labour by floating it down stream to our building-yard, but the wet season was coming on, and the sap had by this time risen in the wood, so that a small piece sunk when thrown into the water. The labour of sinking a saw-pit would have been great, and besides this the expected rains would have kept it always wet. We therefore erected trestles of primitive construction; two triangles of forked poles, 6½ft. long, supported the ends of a stout cross-beam, firmly lashed to them with buffalo hide, and for greater security lashed also to the stem of a tree. The second trestle was destitute of this support, and therefore had to be shored by longer poles, the forks of which took the necks of the opposite triangles, while their hands were stopped by wedges driven into the ground; for additional firmness, lashings were passed at the points of intersection. Two stout poles were laid fore and aft upon the trestles, and shorter pieces across served to rest the log upon; there was some difficulty in lining the lower side, but by cutting notches in the cross-pieces large enough to let the chalk line pass freely, and “springing” it only by short lengths at a time, this was accomplished. It was difficult to teach a young Dutch lad, strong as an ox, and nearly as stolid, to saw with us; but at length the “sapling” was cut, and one of the larger logs lifted gradually up by forming an inclined plane with strong poles, and supporting it whenever we gained a few inches of elevation by forks of various lengths lying ready for that purpose. This having been felled before the sap was up proved much easier to saw, and we had so far overcome the difficulties in our way, that we had commenced laying the bottom plank of the first boat, when the difficulty of providing food, owing to the retreat of the wild animals to the pools which the rainy season was filling all over the desert, and the fever among the people, seven Damaras, mostly women and children, having died in Chapman’s camp, and one of the most useful men in ours, obliged us, for the sake of saving the rest, to retreat to the highlands of the desert, and on the 3rd of February, 1863, we hauled down our colours at Logier Hill, and commenced our return journey.
General hints on boat building.
Two general rules in boat building should be borne in mind. First, that clumsiness is not necessarily strength; and, secondly, that it is much easier to build a sharp swift boat with moderate sheer, and clear lines of entrance and run, than a short one with great beam, bluff bows, and wide overhanging stern. The stem and stern post should rake considerably, or even form parts of a curved line connected by the keel, as if they are made too upright, not only is the boat more difficult to steer when sudden alteration of the course is necessary, but, if she is built of wood, so much curvature is required in the ends of the planks that it is difficult for an inexperienced hand to lay them. A rudder cannot be nicely fitted to a curved stern-post, but if you decide to steer with one instead of an oar, make the stern-post straight, and if you wish to diminish its “rake” or inclination, make it one foot wide below and only a few inches at the top. A rudder is much more convenient in ordinary cases; but, when great quickness and power is required, nothing is equal to the steering oar.
In constructing a clinker-built boat some practice is required in clinching the nails. First, a hole is bored with a gimlet of such a size that the nail requires some driving, but very little, to force it through. This prevents any lateral curvature, which would be fatal to any attempt at clinching. A roove is then put over the joint and driven home to the surface of the plank, and the end of the nail is nipped off nearly close with a pair of cutting pincers. If you have a spring-handled hammer to screw on to the plank so that the face of it just rests on the head of the nail, so much the better, if not, you must hold your heavy hammer with your left hand or get a mate to do so; while with the edge of your little clinch hammer you tap as sharp and lightly as possible on the centre of the cut end of the nail, causing its sides to overspread the edges of the roove, when it can be nicely smoothed off with the face of the hammer. When one plank has been laid, the outside of its upper edge should be bevelled off so as to let the lower edge of the next lie truly against it in the position required by the curvature of the boat’s side; and, to retain it in its place, several pairs of “nippers” should be used. These are made of two pieces of wood—say sixteen inches long and two inches square—cut a mortice ½in. wide by 3in. long in each, and pass through them a piece of hard wood fitting the mortice loosely and 12in. long, so as to project 4in. at either end, in each end of this bore three ½in. holes, not quite in the central line, but one a little on one side of it, and the next on the other, so as to avoid the risk of splitting two into one; have pegs of hard wood or iron to put through these at the distance you may require, then having adjusted one end of the nippers on the planks you wish to hold together, drive a wedge between the other ends till the grip is tight enough. A pair of these is shown in our illustration at [page 106]. We believe that the traveller will find it generally most advisable to build his boat bottom upwards.
Cape-waggon boats.
We should think that a traveller in South Africa, using the common ox-waggons of the country, might easily, and without additional weight, carry up with him all the wood necessary for the purposes of boat building. The floor or bed-plank of the waggon is about thirty-six inches in width, and from twelve to eighteen feet in length. Four deals might be laid down for this. If they were twenty-one feet long, they would project considerably behind. It is not considered expedient to have the fore and hinder wheels too great a distance apart; but then the projecting ends need not be loaded. The usual holes for the fastenings of a waggon bottom should not be bored in them, but they should be secured by lashings of raw hide, and the parts liable to be chafed should also be protected with the same material. They might be previously sawed into planks or battens of the required size, and then tightly lashed together by thongs of raw hide, especially near the ends, which would otherwise be liable to split with changes of weather and rough usage. The waggon sides are usually a little more than two feet high in front and three or more behind, and the framing of these is an elaborate piece of work. Three deals 9in. wide would give 27in. in height all along. These might be cut into ¾in. or ½in. plank, and again bound up with raw hide, like those of the floor, and thus the traveller would have in one waggon nine deals, or more than sufficient, if he built his boat of copper; while, by raising the sides to 36in. with a couple more, he would have enough to construct her entirely of wood.
In building the waggon-tent or tilt, as it would be called in England, two methods are adopted in the Cape. The first is the kap-tent (E on next page), which is regularly framed by the waggon builder with stanchions about five feet high from the floor, neatly fitted to the sides, at intervals of two feet or thirty inches; with bows of flexible wood, forming a flattened arch about nine inches higher, across them, and fore and aft battens, half-checked in, so that the whole presents a smooth external surface to receive the inner sail, or cover of painted canvas, which is laid on before the outer sail, or snow-white neatly-fitted tilt, is drawn over all. The second is that which any competent waggon driver can extemporise for himself with a sufficient quantity of bamboo split into laths two or three fingers broad, stout Spanish reeds, common hogshead hoops, or an adjacent forest, in which flexible poles can be cut. His first care is to lift and shore up his waggon so as to set free one or both of the hinder wheels, on the circumference of which the flexible rods he intends for his bows are bent and fastened down, and in doing this some care is requisite. The rod must not be grasped by both ends and suddenly forced into the curve, for one part may be weaker than the rest, and it may break there, or be forced into an unsightly prominence; but, after having been steamed, if possible, or, as is more commonly the case, laid for two or three days in water or wet earth, the part intended for the centre of the arch should first be bound tight and flat upon the tire of the wheel, then the ends should be gradually pressed down by two assistants, the principal watching the inequalities of the curvature, and reducing them by passing turns of raw hide tightly over any parts that have a tendency to irregular projections. The bows, which should be about twelve or fourteen feet in total length, are now set up. Care having been taken that the waggon sides stand truly, the front and aftermost are first fixed, and the driver, if a man of average height, stands on the centre of the waggon floor, holding the bow as fairly as he can, with the crown of its arch about the level of his eye, say five feet six from the floor, while his assistants, standing outside, fasten the ends with screws or thongs of raw hide, to the styles or stanchions of the waggon sides. The lifter, the dissel-boom, or other straight and heavy pole, is now laid fore and aft upon the bows to keep them in a level line, and also somewhat to flatten the crown of the arch and expand it laterally. The laths or battens, fore and aft, are now lashed on, and the result is a less sightly but stronger and more durable roof for the exigencies of travel than the kap-tent. In the rear of the tent (letter N) are shown the ribs of an ox or buffalo slung to the roof to hang the saddles on.