Summerlee has dropped off in his chair and gives from time to time a peculiarly exasperating snore.  Lord John lies back with his hands in his pockets and his eyes closed.  How people can sleep under such conditions is more than I can imagine.

Three-thirty a.m.  I have just wakened with a start.  It was five minutes past eleven when I made my last entry.  I remember winding up my watch and noting the time.  So I have wasted some five hours of the little span still left to us.  Who would have believed it possible?  But I feel very much fresher, and ready for my fate—­or try to persuade myself that I am.  And yet, the fitter a man is, and the higher his tide of life, the more must he shrink from death.  How wise and how merciful is that provision of nature by which his earthly anchor is usually loosened by many little imperceptible tugs, until his consciousness has drifted out of its untenable earthly harbor into the great sea beyond!

Mrs. Challenger is still in the dressing room.  Challenger has fallen asleep in his chair.  What a picture!  His enormous frame leans back, his huge, hairy hands are clasped across his waistcoat, and his head is so tilted that I can see nothing above his collar save a tangled bristle of luxuriant beard.  He shakes with the vibration of his own snoring.  Summerlee adds his occasional high tenor to Challenger’s sonorous bass.  Lord John is sleeping also, his long body doubled up sideways in a basket-chair.  The first cold light of dawn is just stealing into the room, and everything is grey and mournful.

I look out at the sunrise—­that fateful sunrise which will shine upon an unpeopled world.  The human race is gone, extinguished in a day, but the planets swing round and the tides rise or fall, and the wind whispers, and all nature goes her way, down, as it would seem, to the very amoeba, with never a sign that he who styled himself the lord of creation had ever blessed or cursed the universe with his presence.  Down in the yard lies Austin with sprawling limbs, his face glimmering white in the dawn, and the hose nozzle still projecting from his dead hand.  The whole of human kind is typified in that one half-ludicrous and half-pathetic figure, lying so helpless beside the machine which it used to control.

Here end the notes which I made at the time.  Henceforward events were too swift and too poignant to allow me to write, but they are too clearly outlined in my memory that any detail could escape me.

Some chokiness in my throat made me look at the oxygen cylinders, and I was startled at what I saw.  The sands of our lives were running very low.  At some period in the night Challenger had switched the tube from the third to the fourth cylinder.  Now it was clear that this also was nearly exhausted.  That horrible feeling of constriction was closing in upon me.  I ran across and, unscrewing the nozzle, I changed it to our last supply.  Even as I did so my conscience pricked me, for I felt that perhaps if I had held my hand all of them might have passed in their sleep.  The thought was banished, however, by the voice of the lady from the inner room crying:—­