The boys at first were awestruck at the scene, but their attention was soon called to the difficulties of the pa.s.s. The bed of the stream was covered with rocks of all sizes; sometimes great boulders, as big as a good-sized cottage, almost entirely blocked the way, and would have done so altogether had not the small boulders round them formed slopes on either side. The depths of the ravine echoed and re-echoed, with a noise like thunder, the shout of the driver and the crack of the whip, as the oxen struggled on. The waggons b.u.mped and lurched along over the stones; the natives and whites all worked their hardest, clearing away the blocks as far as possible from the track required for the waggons.

Armed with long wooden levers four or six together prized away the heavy boulders, or, when these were too ma.s.sive to be moved by their strength, and when no other path could be chosen, piled a number of smaller blocks, so as to make a sort of ascent up which the wheels could travel.

The waggons moved but one at a time, the united efforts of the whole party being required to enable them to get along. When the leading waggon had moved forward a hundred yards, the next in succession would be brought up, and so on until the six waggons were again in line; then all hands would set to work ahead, and prepare the path for another hundred yards.

In two places, however, no efforts sufficed to clear the way; the blocks rose in such jagged ma.s.ses that it was absolutely impossible for the oxen to pull across them,--indeed it was with the greatest difficulty that when unyoked they were one by one got over; then tackles were fastened from the top of the rock to the waggons below--ropes and blocks being generally carried by travellers for such emergencies,--the oxen fastened to the ends of the ropes, and with the purchase so obtained the waggons were dragged bodily one by one over the obstacles.

It was not until late in the afternoon that the party pa.s.sed safely through the defile and reached the valley beyond, men and animals worn out by the exertions they had undergone.

The day had not pa.s.sed without excitement, for when they were engaged at the most difficult point of the journey the crack of rifles was heard far overhead, and for half an hour a steady fire was kept up there.

Those below were of course wholly ignorant of what was pa.s.sing there, and for some time they suffered considerable anxiety; for if their guard above had been overpowered they must have been destroyed by rocks cast down by their foes.

At the end of half an hour the firing ceased; but it was not until they camped for the night in the valley beyond the gorge that they learned from the hunters, who joined them there, what had happened. There were, Jumbo explained, three or four hundred natives, but fortunately these approached from the opposite side of the gorge; consequently the little party of defenders was in no danger of attack. The enemy had been disconcerted when they first opened fire, but had then pressed forward to get to the edge of the ravine. The superior weapons of the defenders had, however, checked them, and finding that there was no possibility of coming to close quarters with the little band, they had, after losing several of their number, abandoned the attempt and fallen back.

Soon after nightfall they were startled by a heavy crashing sound, and great rocks came bounding down the sides of the valley. The cattle and waggons were at once moved to the centre of the watercourse, and here they were safe, for the bottom of the valley was so thickly strewn with great boulders that, tremendous as was the force with which the rocks loosened far above came bounding down, these were either arrested or shivered into fragments by the obstacles before they reached the centre of the valley.

No reply to this bombardment of the position was attempted. The enemy were invisible, and there was no clue to their position far up on the hill-side. So long as the rolling down of the rocks was continued, it was certain that no attack at close quarters was intended; consequently, after posting four sentries to arouse them in case of need, the rest of the party, picking out the softest pieces of ground they could find between the stones, lay down to rest.

Before doing so, however, Mr Harvey had a consultation with the hunters. They said that the next narrow ravine was broken by several lateral defiles of similar character, which came down into it, and that it would therefore be quite impossible to keep along the top; whether there were any points at which the enemy could take post and a.s.sail them from above, they knew not.

There was, then, nothing to do but to push steadily on, and early next morning they resumed their way. On the preceding day a slight shower of rain had fallen, but this had been insufficient to increase notably the waters of the streamlet which trickled down among the rocks, for the most part hidden from view. The hunters were of opinion that heavier storms were at hand, and Mr Harvey agreed with them in the belief.

"We are in a very nasty position, boys," he said, "and I wish now that I had turned south, and made my way down to the Limpopo again, and kept along its banks until past this mountain-range; it would have meant a loss of two months' time, and the country which we shall reach when we get through this defile is a very good one for trade. Still, I am sorry now that I did not adopt that plan; for, what with the natives and the torrent, our position is an extremely serious one; however, there is nothing for it but to push on now. We have pa.s.sed one out of the three gorges, and even if the other two are in as bad a condition as the one we came up yesterday, two more days' labour will see us through it."

As the caravan moved along the valley the yells of the natives, high up on the slopes, rose loud and menacing. They must have been disgusted at seeing that the labour upon which they had been engaged the whole night, of loosening and setting in motion the rocks, had been entirely thrown away, for they could see that the waggons and teams were wholly uninjured.

As the caravan reached the point where the valley narrowed again, a mile above the halting-place, they began to descend the slopes, as if they meditated an attack, and the rifles of the whites and the three hunters opened fire upon them and checked those on the bare sides of the hill.

Many, however, went farther down, and descending into the valley crept up under the shelter of the stones and boulders, and as soon as they came within range opened fire with their bows and arrows. By this time, however, the waggons were entering the ravine which, although at its entrance less abrupt and perpendicular than that below, soon a.s.sumed a precisely similar character.

Once well within its shelter Mr Harvey posted d.i.c.k with the three hunters and four of the other natives to defend the rear. This was a matter of little difficulty. Two or three hundred yards up the ravine a barrier, similar to those met with on the previous day, was encountered, and the waggons had to be dragged up by ropes, an operation which took upwards of three hours.

While the pa.s.sage was being effected, d.i.c.k with his party had remained near the mouth of the ravine, and had been busy with the enemy who pressed them; but after the last waggon had safely crossed the barrier they took their station at this point, which they could have held against any number of enemies.

The caravan proceeded on its way, men and animals labouring to the utmost; when, at a point where the sides of rock seemed nearly to close above them, a narrow line of sky only being visible, a great rock came crushing and leaping down, bounding from side to side with a tremendous uproar, and bringing down with it a shower of smaller rocks, which it had dislodged in its course. The bottom of the ravine was here about twelve yards wide, and happened to be unusually level. The great rock, which must have weighed half a ton, fell on one side of the leading waggon and burst into fragments which flew in all directions.

Fortunately no one was hurt, but a scream of dismay broke from the natives.

"Steady!" Mr Harvey shouted; "push on ahead; but each man keep to his work--the first who attempts to run and desert the waggons I will shoot through the head."

"Tom, go on a hundred yards in front, and keep that distance ahead of the leading waggon. Shoot down at once any one who attempts to pa.s.s you."

Rock followed rock in quick succession; there was, however, fortunately a bulge in the cliff on the righthand side, projecting some twenty feet out, and as the blocks struck this they were hurled off to the left side of the path. Seeing this Mr Harvey kept the waggons close along on the right, and although several of the oxen and three or four of the men were struck by detached fragments from above, or by splinters from the stones as they fell, none were seriously injured.

Long after the caravan had pa.s.sed the point the rocks continued to thunder down, showing Mr Harvey that those above were unable to see to the bottom of the gorge, but that they were discharging their missiles at random. A short distance farther a cross ravine, a mere cleft in the rock, some five feet wide at the bottom, was pa.s.sed, and Mr Harvey congratulated himself at the certainty that this would bar the progress of their foes above, and prevent the attack being renewed from any point farther on.

At this point so formidable an obstacle was met with in a ma.s.sive rock, some thirty feet high, jammed in the narrowest part of the ravine, that the waggons had to be emptied and hauled by ropes up the almost perpendicular rock, the oxen being taken through a pa.s.sage, which with immense labour the men managed to clear of stones, under one of the angles of the rock. It was not until after dark that they reached the spot where the ravine again widened out into a valley, having spent sixteen hours in accomplishing a distance of only three miles. However, all congratulated themselves that two-thirds of their labour was over, and that but one more defile had to be surmounted.

The rear-guard remained encamped at the opening of the defile, but the night pa.s.sed without interruption, the natives being doubtless disheartened by the failure to destroy the caravan by rocks from above.

"Do you think there is any chance of their attacking us to-night, down the slopes, as they did this morning?" Tom asked Mr Harvey.

"None whatever," the latter replied, "as you will see in the morning.

This valley does not resemble the last; the rocks rise almost perpendicularly on both sides, and it would not be possible for them to make their way down, even if they wanted to do so."

With the first dawn of light the oxen were inspanned. Just as they were starting, one of the natives of d.i.c.k's party came up to Mr Harvey, and reported that the natives in large numbers were showing in the ravine, and the sharp crack of the rifles, which almost at the same moment broke out, confirmed his statement.

"The defile must be held," Mr Harvey said, "until we are well in the next pa.s.s. When the last waggon has entered I will send back word, and they must then follow us and hold the entrance. Tom, you had better take four more of the armed natives to strengthen the rear-guard. Tell d.i.c.k to come on and join me. You had your fair share of labour yesterday, and your hands are cut about so, by lifting and heaving rocks, that you would be able to do little to-day. It is rather a good sign that the natives are pressing forward in such force on our rear, as it shows that they have no great faith in any attempt they may make to-day to repeat their rock-throwing experiment of yesterday."

As before two natives were sent on ahead to examine the defile, and Mr Harvey moved on with the caravan until he reached the upper edge of the valley, which was scarcely half a mile long. Just as he did so the natives came hurriedly down the defile; they reported that a short distance up they had met with another obstacle, to the full as difficult as that which they had got the waggons over on the preceding day, and that, as they turned an angle in the defile, and came in sight of it, they were saluted by a shower of arrows, and saw a crowd of natives on the top of the barrier. They had thrown themselves down behind the boulders, and had obtained a good view of the natives and the obstacle.

It was some forty feet farther up, and was formed by three or four great boulders jambed in together. On the other side small boulders and stones seemed to have been piled up by the torrent to the level of the rocks; but on the lower side it was almost perpendicular, and they questioned if a man could climb it,--certainly there was no pa.s.sage for oxen.

CHAPTER FIFTEEN.

A MOUNTAIN-TORRENT.

The news brought by the scouts was very serious. The continued fire in the rear showed that the enemy were making a serious attack in that quarter. But Mr Harvey feared that his fighting force there must be weakened greatly, to enable him to attack so formidable a position as that which the enemy occupied in front. Before arriving at any decision as to his best course, he halted the caravan, and went forward himself, with the two natives, to inspect the position which they had discovered.

When he reached the turn in the defile he crawled forward among the boulders until he reached a spot where he could obtain a clear view of the barrier; it was to the full as formidable as it had been described by the scouts. It would have needed an active man to scale the rocks without any opposition from above, while on the top a dense body of natives were cl.u.s.tered, numbering at least fifty, and probably a considerable portion of their force was concealed from view.

Mr Harvey sent back one of the natives to tell d.i.c.k to come on and join him; after which he was to go back and bid Jumbo come up, as Mr Harvey had great confidence in the hunter's shrewdness.

d.i.c.k presently arrived, and was much impressed with the formidable nature of the obstacle.

"We might creep forward," he said, "among the stones and soon drive those fellows off the edge, but they would only lie down behind, and could easily destroy us, as we climbed one by one to the top. Each one, as he got up, would be riddled with a.s.segais. What are you thinking of doing, sir?"

"I don't know what is best, d.i.c.k. I quite agree with you, it is a tremendous position to storm, but on the other hand it would be almost as bad to retreat."

Ten minutes later Jumbo arrived at a run; without a word he threw himself down by the side of Mr Harvey, and for two or three minutes gazed silently at the obstacle ahead; then, to Mr Harvey's surprise, he turned over on to his back, and lay there with his eyes open.

"What on earth are you doing, Jumbo?"

"Look there, sir," the native said, pointing to a glistening spot, the size of a crown-piece, on his stomach.

"Well, what of that?" Mr Harvey said; "that's a drop of rain--there's another fallen on my hat. What do you think of that place ahead?"

"Me no think nothing about him, sir; that place, sir, no consequence one way or the other. You hear him, sir?"

As he spoke a louder crash of thunder burst overhead. Mr Harvey looked up now. That portion of the sky which could be seen was inky black.

Great drops of rain were falling with a pattering sound on the rock.

"Storm come, sir; very bad storm. I see him coming, and say to Ma.s.sa Tom, `Two or tree hour fight over; now you see someting like a mountain-storm. In tree hours water come down twenty feet deep.'"

"You are right, Jumbo. It is lucky the storm has begun so early; if we had got far into the defile we should have been caught. Now, all we have got to do is to wait. Go back, d.i.c.k, and send up every man with fire-arms; we must at once engage those fellows in front and occupy their attention. If they once perceive their danger they will make a desperate rush down here, and it will go hard with us then. When you have sent the fighting-men up, see that the teamsters move all the waggons to the highest piece of ground you can find in the valley. Let them arrange the waggons there as closely as they will pack, and keep the animals well round them. A flood will destroy our enemy, but I am not sure that it may not destroy us too. Now hurry away, and tell the fighting-men to run up as quick as they can. When you have seen everything in readiness, join Tom, and warn him to be ready to fall back to the waggons as soon as the flood comes."

d.i.c.k ran down the ravine. It was not until he issued from it that he was aware how tremendously the rain was pouring down. In the defile he had been conscious only of a slight mist, with an occasional drop of heavy rain, for very few of the rain-drops which entered the gap far above descended to the bottom, almost all striking against the sides.

In the comparatively open valley, however, the rain was coming down in a perfect cataract d.i.c.k at once sent all the fighting-men to the front, and three minutes later the report of musketry told that they were engaged with the enemy.

d.i.c.k now set to work with ten of the natives to select the spot on which to place the waggons. The bottom of the valley was very flat, and the sand between the boulders showed that when the water was high the whole was covered. He, however, found a spot on the left-hand side, about midway between the two defiles, which was some feet higher than the rest.

The hill-side behind at this point rose somewhat less abruptly than elsewhere, and it was probable that the rise in the bottom was formed by a slip which had taken place at some past period. Here the waggons were arranged side by side in two rows, the wheels of the three inner waggons close against the slope above them. The cattle were gathered closely round.