Marco watched these windows anxiously. If the Prince had not gone to Budapest,--if he were really only in retreat, and hiding from his gay world among his treasures,--he would be living in his favorite rooms and lights would show themselves. And if there were lights, he might pass before a window because, since he was inclosed in his garden, he need not fear being seen. The twilight deepened into darkness and, because of the heavy clouds, it was very dense. Faint gleams showed themselves in the lower part of the palace, but none was lighted in the windows Marco watched. He waited so long that it became evident that none was to be lighted at all. At last he loosed his hold on the young boughs and, after standing a few moments in thought, sat down upon the earth in the midst of his embowered tent. The Prince was not in his retreat; he was probably not in Vienna, and the rumor of his journey to Budapest had no doubt been true. So much time lost through making a mistake--but it was best to have made the venture. Not to have made it would have been to lose a chance. The entrance was closed for the night and there was no getting out of the gardens until they were opened for the next day. He must stay in his hiding-place until the time when people began to come and bring their books and knitting and sit on the seats. Then he could stroll out without attracting attention. But he had the night before him to spend as best he could. That would not matter at all. He could tuck his cap under his head and go to sleep on the ground. He could command himself to waken once every half-hour and look for the lights. He would not go to sleep until it was long past midnight--so long past that there would not be one chance in a hundred that anything could happen. But the clouds which made the night so dark were giving forth low rumbling growls. At intervals a threatening gleam of light shot across them and a sudden swish of wind rushed through the trees in the garden. This happened several times, and then Marco began to hear the patter of raindrops. They were heavy and big drops, but few at first, and then there was a new and more powerful rush of wind, a jagged dart of light in the sky, and a tremendous crash. After that the clouds tore themselves open and poured forth their contents in floods. After the protracted struggle of the day it all seemed to happen at once, as if a horde of huge lions had at one moment been let loose: flame after flame of lightning, roar and crash and sharp reports of thunder, shrieks of hurricane wind, torrents of rain, as if some tidal-wave of the skies had gathered and rushed and burst upon the earth. It was such a storm as people remember for a lifetime and which in few lifetimes is seen at all.