It was the boy's object to make off through the neighboring forest after passing from tumulus to tumulus, but he found soon that another body of soldiers was camping upon the far side of the ruined city. He might or might not run the gauntlet in the darkness. The probabilities were that he would not, and hiding behind a tumulus almost midway between the two forces he took thought of his next step.

The Pyramid of the Moon rose almost directly before him, its truncated mass spotted with foliage. Ned could see that its top was flat and instantly he took a bold resolution. He made his way to the base of the pyramid and began to climb slowly and with great care, always keeping hidden in the vegetation. He was certain that no Mexican would follow where he was going. They were on other business, and their incurious minds bothered little about a city that was dead and gone for them.

Up he went steadily over uneven terraces, and from below he heard the chatter of the soldiers. A third fire had been lighted much nearer the pyramid, and pausing a moment he looked down. Twenty or thirty soldiers were scattered about this fire. Their muskets were stacked and they were taking their ease. Discipline was relaxed. One man was strumming a mandolin already, and two or three began to sing. But Ned saw sentinels walking among the tumuli and along the Calle de los Muertos which led from the Citadel to the southern front of the Pyramid of the Moon. He was very glad now that he had sought this lofty refuge, and he renewed his climb.

As he drew himself upon another terrace he saw before him a dark opening into the very mass of the pyramid, which was built either of brick or of stone, he could not tell which. He thought once of creeping in and of hiding there, but after taking a couple of steps into the dark he drew back. He was afraid of plunging into some well and he continued the ascent. He was now about sixty or seventy feet up, but he was not yet half way to the top of the pyramid.

He was so slow and cautious that it took more than a half hour to reach the crest, where he found himself upon a platform about twenty feet square. It was an irregular surface with much vegetation growing from the crevices, and here Ned felt quite safe. Near him and sixty feet above him rose the crest of the Pyramid of the Sun. Beyond were ranges of mountains silvery in the moonlight. He walked to the edge of the pyramid and looked down. Four or five fires were burning now, and the single mandolin had grown to four. Several guitars were being plucked vigorously also, and the sound of the instruments joined with that of the singing voices was very musical and pleasant. These Mexicans seemed to be full of good nature, and so they were, with fire, food and music in plenty, but now that he had been their prisoner Ned never forgot how that dormant and Spanish strain of cruelty in their natures could flame high under the influence of passion. The dungeons of Spanish Mexico and of the new Mexico hid many dark stories, and he believed that he had read what lay behind the smiling mask of Santa Anna's face. He would suffer everything to keep out of Mexican hands.

He crept away from the edge of the pyramid, and chose a place near its center for his lofty camp. There was much vegetation growing out of the ancient masonry, and he had a fear of scorpions and of more dangerous reptiles, perhaps, but he thrashed up the grass and weeds well with his machete. Then he sat down and ate his supper. Fortunately he had drunk copiously at a brook before reaching the ruined city and he did not suffer from thirst.

Then, relying upon the isolation of his perch for safety, he wrapped himself in the invaluable serape and lay down. The night was cold as usual, and a sharp wind blew down from northern peaks and ranges, but Ned, protected by vegetation and the heavy serape, had an extraordinary feeling of warmth and snugness as he lay on the old pyramid. Held so long within close walls the wild freedom and the fresh air that came across seas and continents were very grateful to him. Even the presence of an enemy, so near, and yet, as it seemed, so little dangerous, added a certain piquancy to his position. The pleasant tinkle of the mandolins was wafted upward to him, and it was wonderfully soothing, telling of peace and rest. He inhaled the aromatic odors of strange and flowering southern plants, and his senses were steeped in a sort of luxurious calm.

He fell asleep to the music of the mandolin, and when he awoke such a bright sun was shining in his eyes that he was glad to close and open them again several times before they would tolerate the brilliant Mexican sky that bent above him. He lay still about five minutes, listening, and then, to his disappointment, he heard sounds below. He judged by the position of the sun that it must be at least 10 o'clock in the morning, and the Mexicans should be gone. Yet they were undoubtedly still there. He crept to the edge of the pyramid and looked over. There was the Mexican force, scattered about the ruined city, but camped in greatest numbers along the Calle de los Muertos. Their numbers had been increased by two hundred or three hundred, and, as Ned saw no signs of breaking camp, he judged that this was a rendezvous, and that there were more troops yet to come.

He saw at once that his problem was increased greatly. He could not dream of leaving the summit of the pyramid before the next night came. Food he had in plenty but no water, and already as the hot sun's rays approached the vertical he felt a great thirst. Imagination and the knowledge that he could not allay it for the present at least, increased the burning sensation in his throat and the dryness of his lips. He caught a view of the current of the Teotihuacan, the little river by the side of which the pyramids stand, and the sight increased his torments. He had never seen before such fresh and pure water. It sparkled and raced in the sun before him and it looked divine. And yet it was as far out of his reach as if it were all the way across Mexico.

Ned went back to the place where he had slept and sat down. The sight of the river had tortured him, and he felt better when it was shut from view. Now he resolved to see what could be accomplished by will. He undertook to forget the water, and at times he succeeded, but, despite his greatest efforts, the Teotihuacan would come back now and then with the most astonishing vividness. Although he was lying on the serape with bushes and shrubs all around, there was the river visible to the eye of imagination, brighter, fresher and more sparkling than ever. He could not control his fancy, but will ruled the body and he did not stir from his place for hours. The sun beat fiercely upon him and the thin bushes and shrubs afforded little protection. Toward the northern edge of the pyramid a small palm was growing out of a large crevice in the masonry, and it might have given some shade, but it was in such an exposed position that Ned did not dare to use it for fear of discovery.