He pointed in a direction that suggested Marylebone Workhouse. Amy tried to laugh, but a woman with a child in her arms has no keen relish for such jokes.

‘I don’t talk to them about our affairs,’ she said.

‘That’s best.’

She left home about three o’clock, the servant going with her to carry the child.

At five a familiar knock sounded through the flat; it was a heavy rap followed by half-a-dozen light ones, like a reverberating echo, the last stroke scarcely audible. Reardon laid down his book, but kept his pipe in his mouth, and went to the door. A tall, thin man stood there, with a slouch hat and long grey overcoat. He shook hands silently, hung his hat in the passage, and came forward into the study.

His name was Harold Biffen, and, to judge from his appearance, he did not belong to the race of common mortals. His excessive meagreness would all but have qualified him to enter an exhibition in the capacity of living skeleton, and the garments which hung upon this framework would perhaps have sold for three-and-sixpence at an old-clothes dealer’s. But the man was superior to these accidents of flesh and raiment. He had a fine face: large, gentle eyes, nose slightly aquiline, small and delicate mouth. Thick black hair fell to his coat-collar; he wore a heavy moustache and a full beard. In his gait there was a singular dignity; only a man of cultivated mind and graceful character could move and stand as he did.

His first act on entering the room was to take from his pocket a pipe, a pouch, a little tobacco-stopper, and a box of matches, all of which he arranged carefully on a corner of the central table. Then he drew forward a chair and seated himself.

‘Take your top-coat off;’ said Reardon.

‘Thanks, not this evening.’

‘Why the deuce not?’