five minutes, during which his mind had travelled into a
remote speculation of social conditions of the future, and lost
itself at last over the time dimension, Dr. Kemp roused himself
with a sigh, pulled down the window again, and returned to his
writing desk.

It must have been about an hour after this that the front-door bell
rang. He had been writing slackly, and with intervals of
abstraction, since the shots. He sat listening. He heard the servant
answer the door, and waited for her feet on the staircase, but she
did not come. "Wonder what that was," said Dr. Kemp.

He tried to resume his work, failed, got up, went downstairs from
his study to the landing, rang, and called over the balustrade to
the housemaid as she appeared in the hall below. "Was that a
letter?" he asked.

"Only a runaway ring, sir," she answered.

"I'm restless to-night," he said to himself. He went back to his
study, and this time attacked his work resolutely. In a little
while he was hard at work again, and the only sounds in the room
were the ticking of the clock and the subdued shrillness of his
quill, hurrying in the very centre of the circle of light his
lampshade threw on his table.

It was two o'clock before Dr. Kemp had finished his work for the
night. He rose, yawned, and went downstairs to bed. He had already
removed his coat and vest, when he noticed that he was thirsty. He
took a candle and went down to the dining-room in search of a
syphon and whiskey.

Dr. Kemp's scientific pursuits have made him a very observant
man, and as he recrossed the hall, he noticed a dark spot on the
linoleum near the mat at the foot of the stairs. He went on
upstairs, and then it suddenly occurred to him to ask himself what
the spot on the linoleum might be. Apparently some subconscious
element was at work. At any rate, he turned with his burden, went
back to the hall, put down the syphon and whiskey, and bending
down, touched the spot. Without any great surprise he found it had
the stickiness and colour of drying blood.

He took up his burden again, and returned upstairs, looking about
him and trying to account for the blood-spot. On the landing he saw
something and stopped astonished. The door-handle of his own room
was blood-stained.

He looked at his own hand. It was quite clean, and then he
remembered that the door of his room had been open when he came down
from his study, and that consequently he had not touched the handle
at all. He