"These gents," said the taxi-man, "'ave been and done something nasty."

The phrase seemed attractive to him and he repeated it. The policeman, a tall muscular man, surveyed us in silence. Sarakoff, his hair and beard dishevelled, was leaning back in a corner of the seat, with his legs crossed. His dressing-gown was tucked closely round him, and below it, his pink pyjamas fluttered in the thin breeze. His expression was calm.

The taxi-man continued—

"I picked these gents up in the Euston Road. They was in a hurry. I thought they'd done something ordinary, same as what you or me might do, but it seems I was wrong. They've been and done something nasty. They've gone and invented this 'ere Blue Disease."

The policeman raised his helmet a little and the taxi-man uttered an exclamation.

"Why, you've got it yourself," he said, and stared. The policeman's eyes were stained a vivid blue.

"An immortal policeman!" murmured Sarakoff dreamily.

The discovery seemed to discomfit the taxi-man. The tide of indignation in him was deflected, and he shifted his feet. The policeman, with a deliberation that was magnificent advanced to the seat and sat down beside me.

"Good-morning," I said.

"Good-morning," he replied in a deep calm voice. He removed his helmet from his head and allowed the wind to stir his hair. The taxi-man moved a step nearer us.