Raymond went to the stone slab, and Clarke watched him drearily as he bent over a row of phials and lit the flame under the crucible. The doctor had a small hand-lamp, shaded as the larger one, on a ledge above his apparatus, and Clarke, who sat in the shadows, looked down at the great shadowy room, wondering at the bizarre effects of brilliant light and undefined darkness contrasting with one another. Soon he became conscious of an odd odour, at first the merest suggestion of odour, in the room, and as it grew more decided he felt surprised that he was not reminded of the chemist's shop or the surgery. Clarke found himself idly endeavouring to analyse the sensation, and half conscious, he began to think of a day, fifteen years ago, that he had spent roaming through the woods and meadows near his own home. It was a burning day at the beginning of August, the heat had dimmed the outlines of all things and all distances with a faint mist, and people who observed the thermometer spoke of an abnormal register, of a temperature that was almost tropical. Strangely that wonderful hot day of 185- rose up again in Clarke's imagination; the sense of dazzling all-pervading sunlight seemed to blot out the shadows and the lights of the laboratory, and he felt again the heated air beating in gusts about his face, saw the shimmer rising from the turf, and heard the myriad murmur of the summer.