At last, however, after a journey that seemed interminable by reason of those short naps, which always confuse the sleeper's estimate of time, the detective found himself at Derby still in the dead of the night; for to the railway traveller it is all of night after dark. Here he applied immediately to the station-master, from whom he got another little note directed to him by Mr. Tibbles, and very much resembling that which he had received at Shorncliffe.

"All right up to Derby," wrote Sawney Tom. "Gent in furred coat took a ticket through to Hull. Have took the same, and go on with him direct.—Yours to command, T.T."

Mr. Carter lost no time after perusing this communication. He set to work at once to find out all about the means of following his assistant and the lame traveller.

Here he was told that he had a couple of hours to wait for the train that was to take him on to Normanton, and at Normanton he would have another hour to wait for the train that was to carry him to Hull.

"Ah, go it, do, while you're about it!" he exclaimed, bitterly, when the railway official had given him this pleasing intelligence. "Couldn't you make it a little longer? When your end and aim lies in driving a man mad, the quicker you drive the better, I should think!"

All this was muttered in an undertone, not intended for the ear of the railway official. It was only a kind of safety-valve by which the detective let off his superfluous steam.

"Sawney's got the chance," he thought, as he paced up and down the platform; "Sawney's got the trump cards this time; and if he's knave enough to play them against me—— But I don't think he'll do that; our profession's a conservative one, and a traitor would have an uncommon good chance of being kicked out of it. We should drop him a hint that, considering the state of his health, we should take it kindly of him if he would hook it; or send him some polite message of that kind; as the military swells do when they want to get rid of a pal."

There were plenty of refreshments to be had at Derby, and Mr. Carter took a steaming cup of coffee and a formidable-looking pile of sandwiches before retiring to the waiting-room to take what he called "a stretch." He then engaged the services of a porter, who was to call him five minutes before the starting of the Normanton train, and was to receive an illegal douceur for that civility.

In the waiting-room there was a coke fire, very red and hollow, and a dim lamp. A lady, half buried in shawls, and surrounded by a little colony of small packages, was sitting close to the fire, and started out of her sleep to make nervous clutches at her parcels as the detective entered, being in that semi-conscious state in which the unprotected female is apt to mistake every traveller for a thief.

Mr. Carter made himself very comfortable on one of the sofas, and snored on peacefully until the porter came to rouse him, when he sprang up refreshed to continue his journey.