One morning, just after these labors at the salt-cave were completed, happening to awake unusually early, I turned my thoughts, as I lay waiting for sunrise, to considering what length of time we had now passed on this coast, and discovered, to my surprise, that the very next day would be the anniversary of our escape from the wreck. My heart swelled with gratitude to the gracious God, who had then granted us deliverance, and ever since loaded us with benefits; and I resolved to set to-morrow apart as a day of thanksgiving, in joyful celebration of the occasion. My mind was full of indefinite plans when I rose, and the day's work began as usual. I took care that everything should be cleaned, cleared, and set in order both outside and inside our dwelling; none, however, suspecting that there was any particular object in view. Other more private preparations I also made for the next day. At supper I made the coming event known to the assembled family. "Good people, do you know that to-morrow is a very great and important day? We shall have to keep it in honor of our merciful escape to this land, and call it Thanksgiving Day." VII THE BOA CONSTRICTOR I was seated with my wife and Fritz beneath the shade of the veranda, engaged in wicker work, and chatting pleasantly, when suddenly Fritz got up, advanced a step or two, gazing fixedly along the avenue which led from Jackal River, and finally exclaimed: "I see something so strange in the distance, father! What in the world can it be? First it seems to be drawn in coils on the ground like a cable, then uprises as if it were a little mast, then that sinks, and the coils move along again. It is coming toward the bridge." My wife took alarm at this description, and calling the other boys, retreated into the cave, where I desired them to close up the entrances, and keep watch with firearms at the upper windows. These were openings we had made in the rock at some elevation, reached within by steps, and a kind of gallery which passed along the front of the rooms. Fritz remained by me while I examined the object through my spyglass. "It is, as I feared, an enormous serpent!" cried I; "it advances directly this way, and we shall be placed in the greatest possible danger, for it will cross the bridge to a certainty." "May we not attack it, father?" exclaimed the brave boy. "Only with the greatest caution," returned I; "it is far too formidable, and too tenacious of life, for us rashly to attempt its destruction. Thank God, we are at Rockburg, where we can keep in safe retreat, while we watch for an opportunity to destroy this frightful enemy. Go up to your mother now, and assist in preparing the firearms; I will join you directly, but I must further observe the monster's movements."