He moved backwards into darkness, the dust filling his eyes and throat, sweat trickling down his face, and after a while, came to another opening. He went into it head first and slid gently down a shallow slope, slowing his descent by bracing his hands against the sides.
At the bottom, he paused. It was completely dark, no chink of light anywhere. He was boxed in as securely as if he had been in his own coffin. He pushed the idea away from him and inched forward again.
He came to a side shaft and then another and paused. Six or was it seven? No, six before he roped down to the first level. He pushed forward again, counting until he reached the shaft on his left. He ran his hand along the right side and found at once the supporting bracket he had forced from the wall as a support on that other occasion. He pushed forward, then eased himself backwards into the hole. He supported himself with his arms, uncoiled the nylon rope, looped it into a running line around the bracket he had forced out from the wall, then lowered himself carefully down the shaft. Thirty feet below, it curved into a straight line and he moved into it backwards on his belly, pulling the rope down after him. He coiled it carefully and inched backwards.
Light showed through in several places and he paused at a grille and peered down into the main kitchens. There was a light on, but they were quite deserted and he moved on, emerging into a slightly larger shaft. He twisted round and went forward on his hands and knees.
He was now at the far end of the central block and
perhaps forty minutes had elapsed since he left his cell. He moved on quickly and came out into the bottom of a wide shaft that lifted vertically above his head, bands of yellow light cutting into it from grilles set at several levels.
The zinc lining of the shaft was held in place by a network of steel stays which provided excellent footholds and he started to climb quickly. His objective was a side shaft at the very top which ran through the roof and out across the courtyard to the hospital on the other side.
He became conscious of a strong current of air and a low, humming sound, and frowned. This was something new and the heart moved inside him. A few moments later he reached the top of the shaft and his worst fears were confirmed. Where there had previously been only the entrance to the link with the hospital, there was now a metal grille protecting an electric extractor fan. He stayed there for a moment, tracing the edge of the grille with his free hand, knowing it was hopeless, then started down.
The first grille he came to was only a foot square and he moved on down to the next. This was perhaps two feet square, a tight squeeze certainly, but possible. He could see into a quiet corridor, dimly lit and remembered that these would be the bachelor quarters for unmarried officers.
He hesitated for only a moment, wedged there in the narrow shaft, then took out the screwdriver and pushed his hand as far between the bars of the grille as it would go, holding the screwdriver by the shaft. He felt for the head of the left hand screw and to his relief it started to move at once. A moment later, the screw fell to the floor and he forced the grille down with all his strength.
He went back up the shaft a little way so that he was able to lower himself through the grille feet first. There wasn’t much room, and for a moment he seemed to stick and then went through in a rush, shirt tearing, landing six feet below in the corridor.
He picked himself up quickly, turned and forced the grille back into position, then moved along the corridor. He could hear a radio playing and there was a quick burst of laughter, strangely muted and far away. At the end of the corridor, he came to the stairhead and looked over the banisters. Three floors below he could see the entrance hall quiet and still in the light from a single yellow bulb. He went down quickly, keeping to the wall.