Prisoner-of-war Escapes

A passage from the book... It was November 9th, 1916. I lay in a state of luxurious semi-consciousness pondering contentedly over things in general, transforming utter impossibilities into plausible possibilities, wondering lazily the while if I were asleep. Presently, to my disgust an indefinable, yet persistent "something" came into being, almost threatening to dispel the drowsy mist then pervading my brain. The slow thought waves gradually ceased their surging, and after a slight pause began to collect round the offending mystery, as if seeking to unravel it in a half-hearted sort of way. They gave me to understand that the "something" recurred at intervals, and even suggested that it might be a voice,[2] though from which side of the elastic dividing line it emanated they were quite unable to say.With the consoling thought that voices often come from dreamland I allowed the whole subject to glide gently into the void and the tide of thought to continue its drugged revolutions. The next instant a noisy whirlwind swept the cobwebs away. I knew that the voice was indeed a reality, for it delivered the following message: "A very fine morning, sir!" Obviously my dutiful servant desired me to rise and enjoy the full benefit of the beautiful day. Agreeing with Harry Lauder, that "It's nice to get up in the morning, but it's nicer to stay in bed!" I am sorry to say I cunningly dismissed the orderly with a few false assurances, turned over on my side and promptly forgot all about such trivial matters. Conscience was kicking very feebly, and just as sleep was about to return, the air commenced to vibrate and something swept overhead with a whirling roar