For fully three hours he wrought prodigiously, returning from time to time to Elaine, to guide and assist her with her basket. Between them they managed to produce from their rough material a crude, misshapen receptacle, coarse of mesh and clumsy, yet strong and not to be despised. Grenville expected to use it to fetch his clay from the pit. It was not until this product of their combined ingenuity was fairly complete that Grenville discovered he could split the bark of the creepers readily, and tear out a smooth white core, like a withe, far more suitable to their uses. He then not only stripped out several full-length cores, but he also found that the bark or covering thus removed was constructed of numerous thread-like strands amazingly tough and long. These fibers were not so readily separated as the core had been from the covering with which they were incorporated, although their recovery was not a difficult operation. His inventive mind saw ample employment for them later. The wall was not entirely finished when, at length, he left it for the day. He was weary in all his bone and sinew, despite the prodding of his will. He had made no attempt at kindling fire, and none towards procuring a mast to erect for a flag of distress. These were tasks that must wait for the morrow, with the others he was eager to attack. The dinner at sundown was necessarily a repetition of the previous meals of the day. It could not be followed by the cheer and comfort of a fire, and the darkness, that drew on rapidly, brought a sense of chill and depression to Elaine, notwithstanding her bravery of spirit. The wind had ceased, except for the merest intermittent puffs of breath that floated upward from the sea. Not even the lapping of the tide against the wall arose to break the silence. The stillness was painfully profound, though Elaine's imagination depicted a hundred nocturnal brutes of the jungle, prowling in every trail and clearing, in a savage quest for blood. As a matter of fact, the nightly tragedies were already well begun. But it was not until some victim shrilly voiced its animal fear and agony, just beneath the towering wall, that Elaine had a realizing sense of her nearness to these creatures of the darkness, or the working of life's inexorable laws. Her mind reverted, by natural process, to all the terrible occurrences crowded into her life within the last couple of days--occurrences that seemed so needlessly tragic, and all the alarms excited in her breast, not only by the frightful accident to the "Inca," but likewise by the almost unknown man upon whom she was now dependent. She recalled with singular vividness every accent, every gesture, look, and deed that had accompanied Grenville's declaration. She burned again, with shame and indignation, to think of the things he had dared to say and do--the treachery done to his friend--the indignity done to herself.