He was soon at the bottom of the hill where the street, taking a turn, plunged him at once into a thickly populated district. As this was still the residence quarter, he passed on until he gained the heart of the town and the region of the saloons. Here he slackened pace and consulted a memorandum he had made while talking to Hexford. “A big job,” was his comment, sorry to find the hour quite so late. “But I’m not bound to finish it to-night. A start is all I can hope for, so here goes.”

It was not his intention to revisit the places so thoroughly overhauled by the police. He carried another list, that of certain small groceries and quiet unobtrusive hotels where a man could find a private room in which to drink alone; it being Sweetwater’s conviction that in such a place, and in such a place only, would be found the tokens of those solitary hours spent by Arthur Cumberland between the time of his sister’s murder and his reappearance the next day. “Had they been spent in his old haunts or in any of the well-known drinking saloons of the city, some one would have peached on him before this,” he went on, in silent argument with himself. “He’s too well known, too much of a swell for all his lowering aspect and hang-dog look, to stroll along unnoticed through any of the principal streets, so soon after the news of his sister’s murder had set the whole town agog. Yet he was not seen till he struck Garden Street, a good quarter of a mile from his usual resorts.”

Here, Sweetwater glanced up at the corner gas-lamp beneath which he stood, and seeing that he was in Garden Street, tried to locate himself in the exact spot where this young man had first been seen on the notable morning in question. Then he looked carefully about him. Nothing in the street or its immediate neighbourhood suggested the low and secret den he was in search of.

“I shall have to make use of the list,” he decided, and asked the first passer-by the way to Hubbell’s Alley.

It was a mile off. “That settles it,” muttered Sweetwater. “Besides, I doubt if he would go into an alley. The man has sunk low, but hardly so low as that. What’s the next address I have? Cuthbert Road. Where’s that?”

Espying a policeman eyeing him with more or less curiosity from the other side of the street, he crossed over and requested to be directed to Cuthbert Road.

“Cuthbert Road! That’s where the markets are. They’re closed at this time of night,” was the somewhat suspicious reply.

Evidently the location was not a savoury one.

“Are there nothing but markets there?” inquired Sweetwater, innocently. It was his present desire not to be recognised as a detective even by the men on beat. “I’m looking up a friend. He keeps a grocery or some kind of small hotel. I have his number, but I don’t know how to get to Cuthbert Road.”

“Then turn straight about and go down the first street, and you’ll reach it before the trolley-car you see up there can strike this corner. But first, sew up your pockets. There’s a bad block between you and the markets.”