The secret of the place, as revealed by the tell-tale photograph, existed simply in the perfect natural “blind” provided by the presence of the road through the pass, whilst the slaver’s secret way was defined on the picture by a narrow wavy line, which absolutely wormed its way along the apparently unbroken face of the precipitous cliff itself, this way being primarily gained by climbing over the large, loose boulders which were freely strewed about just inside the entrance to the kloof. Gradually rising, and painfully zig-zagging up the giant wall of the rock, the narrow pathway could be clearly traced until it pierced the dark patch of brushwood which thickly crowned the summits of the towering cliffs, and was thenceforth lost to view. Deferring to Leigh’s anxiety regarding his cousin, the pair left the camp as soon as the moon rose that night, and found, to their surprise, that they could easily climb the slaver’s rocky road, and that what looked like a mere pathway for a goat, was in reality a well-worn track of a uniform width of from two and a half to three feet, and this being positively hollowed out to the depth of nearly a yard, made travelling perfectly safe, if not very fast. Human hands, at least in Central Africa, could never have accomplished such a stupendous task as this, and it was quickly evident to our friends that a small stream, running and zig-zagging down the cliff through the ages of bygone years, had gradually worn for itself a deep channel in the soft sandstone rock, and the lynx-eyed slaver had doubtless seen the value of the position, and on winning his way to the summit, in an abnormally dry season, had turned the stream into some other, and possibly more useful channel.

Proceeding with the utmost caution, and expecting every instant to receive the contents of a rifle through his ribs, Kenyon led the way up this strange ascent and in about forty minutes’ time the pair had entered the dark and heavy patch of trees and brushwood which thickly crowned the cliffs, and which served, in some degree, to mask their true and enormous proportions. Arrived there, progress became of necessity slow, for it was only in places that the moonlight penetrated the interlaced tropic foliage, and threw ghostly patches of light and shade across the path of the adventurers, who drew nearer together as the painfully mysterious silence of the place impressed itself upon them.

It is not an altogether pleasant experience to find yourself alone at night in an ordinary English coppice or plantation, a mile or two from anywhere; but transplant that plantation into equatorial Africa, and stand there with the knowledge that you are hundreds of miles from even the nearest native village, people the wood with bloodthirsty foes, lurking, keen-eyed, in every brake and covert, armed with the treacherous spear or the ready rifle, and you will understand why Leigh and Kenyon, ordinarily bold enough in the open, could only creep forward with their hearts in their mouths, and felt an access of fear when a great owl, disturbed by their cautious passage through the wood, rose from the trees above them, waking the hush of night with a weird, spirit-shaking hoot, and winged his way far off into the moonlight, which was everywhere flooding the outside world with its mellow glory.

Soon, however, our friends again escaped from the lonely wooded path, and emerged into the brilliantly-lighted open, with a magnificent range of vision in every direction, except where the cliffs on the other side of the kloof shot upwards quite a hundred feet beyond the height of those now tenanted by themselves. This peculiarity, which the pair had not previously observed, of course effectually prevented them from seeing anything at all in the southern board, but in front and on each side of them the veldt could be seen sweeping clear away to the skyline, dotted here and there by clumps of bush and by moving herds of game. Behind them the mighty rocks frowned sternly down upon the adventurers, as if rebuking these weak creatures of an hour for disturbing with their puny presence the mist-beshrouded slumber of these mighty monarchs of all time.

After a short conference our friends withdrew again into the shadow of the wood, and sat themselves down to wait patiently for the dawn, talking all the time in a busy undertone, Leigh urging one plan of action, whilst Kenyon was seemingly quite determined upon taking a diametrically opposite course. Leigh wished, in fact, to move on at once towards the north, so as to remove their persons from the tell-tale heights before daybreak, whilst Kenyon was obstinately and aggressively desirous to know what lay behind the frowning wall of rock in their immediate rear, and as this meant re-descending the pass, and apparently crawling up the other side on their hands and knees, without any really definite object in view, Leigh’s arguments certainly seemed the better.

“Why, Kenyon,” he concluded, “do you want to change your mind? Formerly you were anxious to penetrate the swamp from an altogether impossible quarter in order to arrive at our present location, and now that you have a good open down-hill road before you, you are keen to turn your back upon it. At least, let me have your reason for this change of front.”

“Simply this, Leigh,” was the reply. “The pass itself, I now find, lies somewhat to the north of the equator, and I am positively certain that the man we seek will be found in some place which lies absolutely on the equatorial line, consequently behind us, and therefore away on the other side of the kloof.”

“But why, in the name of common-sense,” persisted Leigh, “should your man live on the equator, or near it at all? That’s what I can’t understand.”

“See here, Leigh,” was the cool answer; “that was my very first clue to this affair. He lives on latitude Number 0, otherwise Zero. Basing my whole theory and reasoning upon that, I have traced him to this spot, so I may fairly assume that my deductions are correct. However, sooner or later we shall have to investigate this side of the pass, so if you like we’ll toss up when daylight comes, and let the coin decide for us.”

Still unconvinced, though admiring the shrewdness of his comrade in following up a mere piece of guess-work, and elaborating it into such a strikingly correct theory, Leigh continued to urge his view of the matter, and soon the dawn came gliding over the earth, waking all nature with a kiss of peace, and preparing her for the advent of the glorious orb of day.