Sure enough, there was a portion of the light line still fast to the tree, and as Sumner pulled it in, both boys bent over to examine it. It had been broken, and not cut. From its length it must also have been broken close to the canoe.

"Oh, Sumner, what shall we do?" asked Worth, in a tone of such despair that the former at once realized the necessity of some immediate action to divert his comrade's thoughts.

"Do?" he cried. "There's plenty to do. First, we'll go down to that point and take a look to seaward; for, as the tide is running out, they are more likely to have gone in that direction than any other. It would be a comfort even to catch a glimpse of them. Then, perhaps, they have only drifted away, and are stranded on some bar near by. Besides looking for the canoes, we must build some kind of a shelter for the night, cook supper, and discuss our plans for the future. Oh yes, we've plenty to do!"

While he spoke, the boys were making their way to the point in question, and when they reached it, they eagerly scanned every foot of water in sight. Diagonally to the right from where they stood stretched the long reach of Lower Metacumba, desolate and uninhabited as they knew. Almost directly in front, but several miles away, rose the palm-crowned rocks of Indian Key, with its two or three old shed-like buildings in plain view. These had been used and abandoned years before by the builders of Alligator Light, the slender tower of which they could see rising from the distant waters above the outer reef. Diagonally on the left was the tiny green form of Tea Table Key, and dimly beyond it they could make out the coast of Upper Metacumba, which Sumner said was inhabited. In all this far-reaching view, however, there were no signs of the missing canoes.

"I'm glad of it!" said Sumner, after his long searching gaze had failed to reveal them. "It would be rough to have them in sight but out of reach."

Already the sun was sinking behind the tree-tops of Lower Metacumba, fish were leaping in the placid waters, and a few pelican were soaring with steady poise above them. Every now and then these would swoop swiftly down, with a heavy splash that generally sealed the fate of one or more mullet off which the great birds were making their evening meal. A flock of black cormorants, uttering harsh cries, flew overhead with a rushing sound, returning from a day's fishing to their roosts in the distant Everglades. With these exceptions, and the faint boom of the surf on the outer reef, all was silence and desertion. Besides the light-house tower there was no sign of human life, not even the distant glimmer of a sail. While the boys still looked longingly for some trace of their canoes, the sunset, and a red flash, followed at short intervals by two white ones, shot out from the vanishing form of Alligator Light.

"Come!" cried Sumner, heedful of this warning. "Night is almost here, and we have too much to do in every precious minute of twilight to be standing idle. I'll take the bucket and run to the pond for water, while you cut all the palmetto leaves you possibly can, and carry them to the place where we landed."

"The bucket?" repeated Worth, looking about him inquiringly. "Where are you going to find it?"

Without answering, Sumner sprang down the rocks to the water's edge, where he had noticed a stranded bamboo, and quickly cut out a short section of it with the hatchet that he had thrust into his belt before leaving the canoes. As he made the cuts just below two of the joints, his section was a hollow cylinder, open at one end, but having a tight bottom and capable of holding several quarts of water. With this he plunged into the forest in the direction of the pond, handing Worth the hatchet as he passed, and bidding him be spry with his palmetto leaves.