“Mr. Vly, this is Starman David Foster, Commander of the Starlight Enterprise ship _Vigilant Warrior_,” Zip broke in. “We understand and respect your reluctance to receive visitors and will stay no longer than necessary. We are calling on you because your friend George St. George has information we need which is vital to the safety of all the settlements on Mars and even the Earth-Moon system. We also believe it possible that he is in danger from violent men.” “Well, _that’s_ a new one. George in danger? What about it?” “May we land, Mr. Vly? I don’t want to take the slightest risk that our conversation can be overheard. We won’t stay any longer than necessary.” “You’ve found me. May as well come in and state your business.” The communicator was shut off from Vly’s end. Zip came up on the Castle. It didn’t take long to find the landing site. There were two spacecraft in position in about the middle of the asteroid. One was a small ship suitable for local jaunts, and the other was a normal-sized craft capable of interplanetary travel. The name _Sentinel_ was painted on the side of the larger craft. Both were very old and in places a little battered, but were clearly cared about and well kept up. The _Vigilant Warrior_ touched down about fifty yards from the closest of Vly’s craft. Joe shut off the engines and pressed the security button. A slight shudder ran through the ship as bolts shot from the fins, securing the ship to the surface. The Starmen disembarked and descended the ladder. “Over there,” pointed Joe. The entrance to the airlock was discernible across the tiny landing area. The Starmen began walking toward it. The starfield swept away to right and left, with a couple of nearby asteroids visible to the eye. A great horn of stone rose up before them, sweeping to a point above. Behind them a similar horn curved up in the opposite direction. The ground was uneven, with contours sharply defined. Jagged, broken rock comprised most of the terrain, with a few smooth ripples which rose about twenty or thirty feet from the plain. Shadows were utterly dark in the vacuum of space. The Starmen wore asteroid shoes, designed for walking in low gravity conditions. Their soles had an automatic “smart grip” function that gripped the ground when weight was placed on them, but released when the walker took another step. Without the asteroid shoes, the minimal gravity of “Montezuma’s Castle” would have made walking a difficult, even dangerous, task.