"The tree must have stood in a hole in the rock," he said. "Try another one, Bertie." The same results were obtained. "That explains it, Bert. Evidently when they planted the trees to prevent this place from being seen from the hills, they cut away the rock in circles about twelve feet across and made cup-shaped holes, which they filled up with earth. When they planted the young trees I dare say at first they watered them. They could easily enough fetch water up from the stream. When the trees got fairly rooted they would be able to leave them alone, perhaps giving them a good watering once every two or three months. Whenever the rains came they would be able to give up watering altogether, for in these basins the earth would keep moist for a very long time. It would be a big job, but no doubt the king who built the place had all his tribe at work on it. It is probable that the Incas had established themselves at Cuzco for many years before they came down to this place, and the trees may not have been planted till their coming was first heard of. In that case there would be plenty of time to hide the place before they came down and searched the shore. We know that the Chimoos resisted them for a considerable time before they were finally conquered. Well, for whatever purpose this place was built it is one in which either the Chimoos or the Incas, if they ever found the place, would be likely to hide treasure, which is satisfactory. Now we will sit down here for a short time and watch both windows. You look at the two top lines, Bertie, and I will look at the two lower lines. I certainly do not see any signs of life. That is how the water gets out," and he pointed to a roughly-shaped arch about twelve feet wide and as many high. Through this the little stream disappeared. "I expect there is a similar passage at the other end."