The Secret of the League by Ernest Bramah

The storm had not decreased its violence when, three minutes later, Salt stood unperceived on the broad coping outside an upper storey of the tower, and, sinking forward into the teeth of the gale, was borne upwards with rigid wings as a kite ascends.

In accordance with his instructions the two searchlights had turned their beams steadily earthward for the time, and in the absolute blackness of the upper air he could pass over the firing lines of friends and foes in comparative safety. As he rose higher and higher before turning to scud before the wind, he saw, as on a plan, the whole field of operations, just distinguishable in its masses of grey and black, with the points of interest revealing themselves by an occasional flash. Immediately beneath him, beneath him at first, but every second drawing away to the south-west as he drifted in the gale he breasted, lay Hanwood, with its three outer lines of defence. From above it seemed as though a very bright needle was every now and then thrust out from the walls into the dark night and drawn back again. On each of the platforms D and E two 4.7-inch quick-firing guns appeared to be rocking slightly in the wind.