was hot for the time of year.

"Very," answered the stranger shortly, hesitated a second, and added in a
colourless tone, "I can't sleep."

Isbister stopped abruptly. "No?" was all he said, but his bearing
conveyed his helpful impulse.

"It may sound incredible," said the stranger, turning weary eyes to
Isbister's face and emphasizing his words with a languid hand, "but I
have had no sleep--no sleep at all for six nights."

"Had advice?"

"Yes. Bad advice for the most part. Drugs. My nervous system.... They are
all very well for the run of people. It's hard to explain. I dare not
take ... sufficiently powerful drugs."

"That makes it difficult," said Isbister.

He stood helplessly in the narrow path, perplexed what to do. Clearly the
man wanted to talk. An idea natural enough under the circumstances,
prompted him to keep the conversation going. "I've never suffered from
sleeplessness myself," he said in a tone of commonplace gossip, "but in
those cases I have known, people have usually found something--"

"I dare make no experiments."

He spoke wearily. He gave a gesture of rejection, and for a space both
men were silent.