It was with a view to some such contingency that he had alighted at Doncaster instead of returning to London, and he now made up his mind to return on the following day to Hull and, the Girondin having by that time left, to see what he could learn at the Ferriby depot.
He spent three days shadowing Benson, without coming on anything in the slightest degree suspicious. The manager spent each of the days at the wharf until about six o’clock. Then he walked to Ferriby Station and took the train to Hull, where he dined, spent the evening at some place of amusement, and returned to the depot by a late train.
On the fourth day, as the same program seemed to be in prowess, Willis came to the conclusion that he was losing time and must take some more energetic step. He determined that if Benson left the depot in the evening as before, he would try to effect an entrance to his office and have a look through his papers.
Shortly after six, from the hedge behind which he had concealed himself, he saw Benson appear at the door in the corrugated iron fence, and depart in the direction of Ferriby. The five employees had left about an hour earlier, and the inspector believed the works were entirely deserted.
After giving Benson time to get clear away, he crept from his hiding place, and approaching the depot, tried the gate in the fence. It was locked, but few locks were proof against the inspector’s prowess, and with the help of a bent wire he was soon within the enclosure. He closed the gate behind him and, glancing carefully round, approached the shed.
The door of the office was also locked, but the bent wire conquered it too, and in a couple of minutes he pushed it open, passed through, and closed it behind him.
The room was small, finished with yellow matchboarded walls and ceiling, and containing a closed roll-top desk, a table littered with papers, a vertical file, two cupboards, a telephone, and other simple office requisites. Two doors led out of it, one to the manager’s bedroom, the other to the shed. Thinking that those could wait, Willis settled down to make an examination of the office.
He ran rapidly though methodically through the papers on the table without finding anything of interest. All referred to the pit-prop industry, and seemed to indicate that the business was carried on efficiently. Next he tackled the desk, picking the lock with his usual skill. Here also, though he examined everything with meticulous care, his search was fruitless.
He moved to the cupboards. One was unfastened and contained old ledgers, account books and the like, none being of any interest. The other cupboard was locked, and Willis’s quick eyes saw that the woodwork round the keyhole was much scratched, showing that the lock was frequently used. Again the wire was brought into requisition, and in a moment the door swung open, revealing to the inspector’s astonished gaze—a telephone.
Considerably puzzled, he looked round to the wall next the door. Yes, he had not been mistaken; there also was affixed a telephone. He crossed over to it, and following with his eye the run of the wires, saw that it was connected to those which approached the shed from across the railway.