“Is there any way they can get at us, except by those tubes?” Dalla asked. “They could cut a hole in the floor, or burn one through,” Sarnax replied. “They have plenty of thermite. They could detonate a charge of explosives over our heads, or clear out of the dome and drop one down the well. They could use lethal gas or radio-dust, but their Assassins wouldn’t permit such illegal methods. Or they could shoot sleep-gas down at us, and then come down and cut our throats at their leisure.” “We’ll have to get out of this room, then,” Verkan Vall decided. “They know we’ve barricaded ourselves in here; this is where they’ll attack. So we’ll patrol the perimeter of the well; we’ll be out of danger from above if we keep close to the wall. And we’ll inspect all the rooms on this floor for evidence of cutting through from above.” Sarnax nodded. “That’s sense, Lord Virzal. How about the lifter tubes?” “We’ll have to barricade them. Sarnax, you and Dirzed know the layout of this place better than the Lady Dallona or I; suppose you two check the rooms, while we cover the tubes and the well,” Verkan Vall directed. “Come on, now.” * * * * * They pushed the door wide-open and went out past the cabinet. Hugging the wall, they began a slow circuit of the well, Verkan Vall in the lead with the submachine-gun, then Sarnax and Dirzed, the former with a heavy boar-rifle and the latter with a hunting pistol in each hand, and Hadron Dalla brought up in the rear with her rifle. It was she who noticed a movement along the rim of the balcony above and snapped a shot at it; there was a crash above, and a shower of glass and plastic and metal fragments rattled on the pavement of the court. Somebody had been trying to lower a scanner or a visiplate-pickup, or something of the sort; the exact nature of the instrument was not evident from the wreckage Dalla’s bullet had made of it. The rooms Dirzed and Sarnax entered were all quiet; nobody seemed to be attempting to cut through the ceiling, fifteen feet above. They dragged furniture from a couple of rooms, blocking the openings of the lifter tubes, and continued around the well until they had reached the gun room again. Dirzed suggested that they move some of the weapons and ammunition stored there to Prince Jirzyn’s private apartment, halfway around to the lifter tubes, so that another place of refuge would be stocked with munitions in event of their being driven from the gun room.