Some way off an intermittent white light smote up from below, touched the snow eddies with a transient glitter, and made an evanescent spectre in the night; and here and there, low down, some vaguely outlined wind-driven mechanism flickered with livid sparks.
All this he appreciated in a fragmentary manner as his rescuers stood about him.

Someone threw a thick soft cloak of fur-like texture about him, and fastened it by buckled straps at waist and shoulders.

Things were said briefly, decisively.

Someone thrust him forward.
Before his mind was yet clear a dark shape gripped his arm.

"This way," said this shape, urging him along, and pointed Graham across the flat roof in the direction of a dim semicircular haze of light.