If the Mexican had been on watch there, he had left his post. In a minute Starr saw him hurrying down the unused side street, toward the angry glow that told where the fire had started. Too much temptation, Starr interpreted the fellow's desertion of his post; or else no more men were expected at _Las Nuevas_, and the outpost was no longer needed. Taking it for granted that a meeting had been called here, Starr reasoned from that assumption. He waited another minute or two, watching and listening. There was nothing at the front to break the quiet or spoil the air of desertion that surrounds an empty office building at midnight. He went cautiously to the rear corner and turned there to look back at the building, watchful for any stray beam of light or any movement. The upper story was dark as the rest of the yard and building, and Starr could almost believe that he was on the wrong track entirely, and that nothing was going on here. But he continued to stand there, loath to give up and go home with nothing accomplished. Close beside the building and back perhaps twenty feet from the front corner, a telephone and electric light pole stood with outstretched arms, holding aloft its faintly humming wires. Starr stood looking that way for some time before it occurred to him that there was no street light near enough to send that warm, yellow glow across the second bar from the bottom. The rest of the pole was vague and shadowy, like everything else in the immediate neighborhood. The bottom of the pole he could not see at all from where he stood, it was so dark alongside the building. But that second cross-arm was lighted as from a near-by window. Yet there was no lighted window anywhere in the place. Starr was puzzled. Being puzzled, he went slowly toward the pole, his face turned upward. The nearest street lamp was a full block away, and it would have lighted up the whole top of the pole evenly, if at all. At the foot of the pole Starr stood for a minute, still staring upward. Then he reached up, gripped the metal steps and began carefully to climb. Before he had reached the lighted cross-arm he knew that the glow must come from a skylight; and that the skylight must be the one that had saved that hidden little office room from being dark. He was no lineman, but he knew enough to be careful about the wires, so it took him several minutes to work his way to where he could straddle a crosstree that had few wires.