Smith had been badly winded by his fall. Several seconds elapsed before he realised that Schaffer wasn't where he should have been -- lying on the roof beside him. He twisted round, saw the white blur of Schaffer's strained and desperate face, had a vague impression of Schaffer's eight finger-nails scoring their way through the ice as his body, already, up to mid-thigh, slid inexorably over the edge and brought his left hand flashing down with a speed and power that, even in those circumstances, made Schaffer grunt in pain as the vice-like grip clamped over his right wrist.
For some seconds they lay like that, spreadeagled and motionless on the sloping rope, the lives of both dependent on the slim imbedded blade of Smith's knife; then Schaffer, urged by Smith's quivering left arm, began to inch his way slowly upwards. Thirty seconds later and he was level with Smith.
'This is a knife I have, not an ice-axe,' Smith said hoarsely. 'Won't take much more of this. Have you another knife?'
Schaffer shook his head. Momentarily, speech was beyond him.
'Piton?'
The same shake of the head.
Schaffer nodded, reached under the cumbersome snow-smock with his left hand and eventually managed to wriggle his torch free.
'Unscrew the bottom,' Smith said. 'Throw it away -- and the battery.' Schaffer brought his left hand across,to where his right was pinioned by Smith, removed base and battery, flattened the now empty cylinder base a little, reversed his grip and gouged the torch into the ice, downwards and towards himself. He moved his right hand and Smith released his grip. Schaffer remained where he was. Smith smiled and said: 'Try holding me.'
Schaffer caught Smith's left wrist. Tentatively, his hand still hooked in readiness, Smith removed his hand from the haft of the knife. Schaffer's imbedded torch held firm. Cautiously at first, then with increasing confidence as the sharp blade cut through the protective sheathing of ice, Smith carved out a secure handhold in the wooden roof of the station, passed his knife to Schaffer, wriggled out of his snow-smock, undid a few turns of the knotted rope round his waist and secured the free end to Schaffers' belt. He said: 'With the knife and torch, think you can make it?'
'Can I make it?' Schaffer tested both knife and torch and smiled, a pretty strained effort, but his first for some time.
'After what I've been through -- well, ever seen a monkey go up a coconut palm tree?'
Fifty feet above their heads, Mary withdrew from the window and laid the binoculars on the chest of drawers. Her hands shook and the metal of the binoculars rattled like castanets against the glass top. She returned to the window and began to pay out the weighted string.
Smith came up the last few feet of the sloping roof at the end of the rope, caught Schaffer's hand, stood upright on the flat inner section of the roof and at once began to unwind the rest of the knotted rope from his waist. Schaffer, although the temperature was far below freezing, wiped his brow like a man in a heat-wave.
'
Smith grinned, clapped his shoulder, reached up into the gloom, caught the weighted end of the suspended string and quickly bent the nylon on to it. He gave two gentle tugs and the rope began to move upwards as Mary hauled it in through the window. Smith waited until two more gentle return tugs indicated that the rope was securely fastened and began to climb.
He was half-way up to the window when the moon broke through. In his Alpenkorps uniform he was perfectly silhouetted against the gleaming white of the castle walls. He hung there motionless, not daring to move, not so much as even daring to glance upwards or downwards lest the movement attract some hostile attention.