In his conversations in the evenings and during their Sunday strolls, he would instruct and amuse his hearers with his reminiscences and adventures in all parts of the world, or with his intimate knowledge of the wild life around them. From his account, he had undergone, at times, terrible and extraordinary hardships and privations on the plains and in the forests of India and Africa; of Australia; the Steppes of Tartary; the Highlands of Thibet; the interior of China and Japan; the wilds of Siberia; of Canada; the prairies of North America, and the pampas, plains, and rugged mountains of South America--all, as Dr. Lorien had said, seemed to be alike known to him. Nor was he less familiar with the countries and cities of Europe; yet he spoke of his travels and experiences in a simple manner that had in it nothing of boastfulness or ostentation, but as though his sole object were to amuse and entertain his two young friends. As they penetrated farther into the forest, their work became harder and the progress slower. This latter was unavoidable, since each day they had to walk farther and farther to and fro. Moreover, the Indians, who had displayed greater courage--so Monella had said--now that they had two more white men with them, once more began to show signs of nervous apprehension and fear. This was doubtless due to the great difference in many ways--some definite enough, others indefinable and vague--between this forest and those generally to be found in the tropical regions of South America. Not only were the trees still more gigantic--making it gloomier--and the undergrowths more dense and tangled, but the birds and animals, judging from their cries, were unfamiliar to them. Many of the sounds usual to forest life in British Guiana were absent; the constant note of the 'bell-bird' was not heard, nor was even the startling roar of the howling monkeys. Instead were heard other sounds and noises of an entirely novel and peculiar kind, unknown even to the Indians who had been used to forest travelling all their lives; sounds that even Monella either could not explain--or hesitated to. One of these was a horrid combination of hiss and snort and whistle, loud and prolonged like the stertorous breathings of some monstrous creature. Some of the Indians declared that this was the sound traditionally said to proceed from the great 'camoodi,' the monstrous serpent that is supposed to guard the way to Roraima mountain; while others inclined to the opinion that it was made by the equally dreaded 'didi,' the gigantic 'wild man of the woods,' that also had, as they averred, its special haunts in this particular forest. At times, a startling, long-drawn cry would echo through the wood, so human in its tones as sometimes to cause them to rush in the direction it seemed to come from, in the belief that it was a cry for help from one of the party who was in danger. This strange, harrowing cry, the Indians called 'The cry of a