"Bless your soul, old man, I don't know. Better call agin; she's allus in evenings," suggested the man at the edge of the street.

"Mebbe we had," grunted the old man at the door. Then he and his companion moved out of the alley. They went but a little way when they came to a full stop, and entered into a low confab.

A pair of keen eyes was watching them during the time, however, and a little later the man who had addressed the two strangers walked away. He passed to the rear of the block, and made his way by a back stairs to a room on the first floor. Here he found the one he was seeking— Mrs. Scarlet—who was engaged in discussing a supper of bread and beer.

She was alone.

"Eh? so you're here again, Nick? Did he send ye?"

"The Professor?"

"Who else should I mean?"

"Wall, he didn't, then. I seed a couple of blokes in the alley jist now, and they 'quired for you."

"Why didn't you send 'em up?" and the woman laughed in a way that revealed her ragged teeth and unwholesome gums.

"They'll be back soon 'nough," answered the man. "I've an idee they mean mischief. Better you go below and see 'em when they do come."