Their tracks were thick in the mud: half a dozen pairs of bare, splay feet, the slender prints of Constance's shoes, the marks of De Albor's Turkish slippers. He followed them with increasing difficulty as the ground grew higher and harder. He would have missed the spot where they turned off the dim trail but for the fluttering of a bit of silk in the faint breeze. Constance had brushed against a tree-trunk there, and the rough bark had shredded off a fragment of her dress. The band had been headed east, toward the Manor. At the spot where the bit of cloth hung, they had turned sharply southward. The matted pine needles showed no tracks, but disarranged vines and branches bent aside marked their progress, until McGrath, following these signs, came out upon another trail leading southward. Here and there were marshy spots, and these showed the prints of feet, bare and shod. McGrath hastened along the trail, pistol in hand, in full possession of his faculties at last. His face was grim and pale. De Albor had not had an opportunity to disarm him after striking that treacherous blow. Both the octoroon and the blacks of the pinelands believed him to be lying helpless back in Lost Cave. That, at least, was to his advantage. He kept straining his ears in vain for the drum he had heard earlier in the day. The silence did not reassure him. In a voodoo sacrifice drums would be thundering, but he knew he was dealing with something even more ancient and abhorrent than voodoo. Voodoo was comparatively a young religion, after all, born in the hills of Haiti. Behind the froth of voodooism rose the grim religions of Africa, like granite cliffs glimpsed through a mask of green fronds. Voodooism was a mewling infant beside the black, immemorial colossus that had reared its terrible shape in the older land through uncounted ages. Zambebwei! The very name sent a shudder through him, symbolic of horror and fear. It was more than the name of a country and the mysterious tribe that inhabited that country; it signified something fearfully old and evil, something that had survived its natural epoch--a religion of the Night, and a deity whose name was Death and Horror. He had seen no negro cabins. He knew these were farther to the east and south, most of them, huddling along the banks of the river and the tributary creeks. It was the instinct of the black man to build his habitation by a river, as he had built by the Congo, the Nile and the Niger since Time's first gray dawn. Zambebwei! The word beat like the throb of a tom-tom through the brain of Bristol McGrath. The soul of the black man had not changed, through the slumberous centuries. Change might come in the clangor of city streets, in the raw rhythms of Harlem; but the swamps of the Mississippi do not differ enough from the swamps of the Congo to work any great transmutation in the spirit of a race that was old before the first white king wove the thatch of his wattled hut-palace.