Gorlias now got the end of the fishing-line ashore, and took it in his teeth in order to climb up the inclined plane of the pier on his hands and feet, ape-fashion. In a few seconds he had found the end of a string that hung down from the blackness above, with a small stone tied to it to keep it from being blown adrift. To this string he bent the fishing-line. Until this was done neither of the men had made the least sound that could possibly be heard above, but now Gorlias gave a signal. It was the cry of the beautiful little owl that haunts ruined houses in Italy and the East, one soft and musical note, repeated at short and regular intervals. The bird always gives it thus, but for the signal Gorlias whistled it twice each time, instead of once. No living owl ever did that, and yet it was a thousand to one that nobody would notice the difference, if any one heard him at all, except the person for whom the call was meant. He had not been whistling more than a quarter of a minute when he felt the twine passing upwards through his fingers, and then the line after it. He let the latter run through his hand to be sure that it did not foul and kink, though he had purposely chosen one that had been long in use, and he had kept it in a dry place for a week. Zeno had dropped his cloak in the stern of the boat before getting out, and he now sat at the water's edge with his hands on the moving line ready to check the end when it came, in case it were not already fast to the rope that was to follow it. But Gorlias had done that beforehand, lest any time should be lost, and presently Zeno felt the line growing taut as it began to pull on the rope itself. This had single overhand knots in it, about two feet apart, for climbing, and instead of coiling it down, Gorlias had ranged it fore and aft on the forward thwarts so that it came ashore clear. Whatever the astrologer's original profession had been, it was evident that he understood how to handle rope as well as if he had been to sea. Moreover Zeno, who was as much a sailor as a soldier, understood from the speed at which the rope was now taken up, that there was a tolerably strong person at the other end of it, high up in the topmost story of the tower. The end came sooner than he expected, and a slight noise of something catching and knocking against the inner side of the boat brought Gorlias instantly to the water's edge. 'The tail-block is fast to the end,' he whispered; 'and the other line is already rove, with the basket at one end of it. When you are aloft, you must haul up the climbing rope and make the block fast--you understand.' 'Of course,' Zeno answered, 'I have been to sea.' 'Whistle when you are ready and I will answer. As he comes down I can check the rope with a turn round a smooth stone I have found at the corner of the tower. You must come down the climbing rope at the same time, and steer the basket as well as you can with your foot.' 'Yes. Is all fast above?'