A set of signals is arranged in Nick's house, by which he always knows
when one of his staff gets in.

"Patsy," said Nick, "there's a fellow up stairs whom you'll have to
shadow."

"Gaspard?"

"No; a man who calls himself Hammond. Gaspard has identified him as the
man who was in room A."

"Look here," said Patsy, "am I a farmer, or is the man Gaspard the
greatest living identifier?"

"What do you mean?"

"Why, it strikes me that he picked out his men a good deal too easy. If
it's all straight, I'd like the loan of his luck for a few days.

"That identification on the elevated station looked to me like a fake.
I don't believe he ever intended that you should get hold of the man.

"In my opinion, he's simply running around identifying everybody he
sees."

"But this man Hammond admits it."

"Is he telling the truth?"