A nasal voice answered, but the Inspector could not hear the words. John’s voice, now more distant, mumbled something in reply, and there was a word, apparently of assent, from the other.

Tanner glanced round the room. Beside the easy chair in which he sat—leather lined, and very old and worn—there was not much that made for comfort. A deck chair stood with its back to one of the rather small windows. In front of the other window was a table on which lay a number of books, mostly dealing with bee keeping. The floor was covered by a carpet, the worn, threadbare condition of which was brought out pitilessly by the rays of the sun which struck obliquely across it. Tanner got up and began to poke about, but without taking his eye off the bottom of the stairs. William, it was evident, was in no hurry to come down.

Suddenly there came faintly the purr of a motor engine, and in a few seconds the sounds indicated that a car had started at no great distance away. It grew louder, and Tanner moved to the window. The sitting-room was in the gable beside the lane, and as the Inspector looked out he saw a small two-seater with one occupant pass out towards the road. But this occupant was a small man, and though his collar was turned up and his cap pulled down over his eyes, Tanner could see he had a grey beard.

He stood for a moment wondering how John had got downstairs without having been seen. Then, as the house seemed strangely quiet, an idea flashed into his mind, and he ran to the stairs and called, ‘Anyone there?’ There was no answer, and with a sudden feeling of foreboding, he raced up. Three rooms opened off a short landing, and the doors being open, he glanced into each in turn. They were all empty!

A casement window on the landing was open, and as Tanner looked out, he saw what had been done. About three feet below the sill was the roof of a low shed. Nothing could be easier than to step out of the window on to the roof, and drop to the ground. The open door of the outhouse to which led many wheel tracks showed where the motor had been kept.

Tanner swore savagely. Never before had he been so completely and so easily duped. It was now evident to him that William Douglas had recognised him approaching the house, and had invented a brother to enable him to hold the Inspector’s attention while he bolted. And he had played his cards skilfully! Ruefully the Inspector had to admire the trick, though he surmised it had been worked out beforehand in view of just such an emergency.

‘He’ll not get far,’ the angry man growled, as he prepared to follow. But, thinking a moment or two would now make little difference, he turned his steps instead to the kitchen. There on a shelf, as he had expected, were three or four pairs of boots. Drawing from his pocket a tracing of the marks on the Cranshaw River bank, he eagerly compared it with the soles. Those of the first pair he took up corresponded! Here was proof, if proof were required. William Douglas had been at the Luce Manor boathouse on the night of the murder!

Seizing a small handbag he had noticed in the sitting room, the Inspector packed the boots, then, after closing the windows, and locking the yard gates and the house doors, he hurried back along the road towards Yelverton. Inquiring for the local telephone call office, he rang up the Plymouth police authorities, describing, so far as he was able, the man and the car, and asking them to have a ring formed round the locality. Hastening on to the Yelverton police station, he told the sergeant what had occurred, and handing him the keys of the cottage, instructed him to take charge, and to make a thorough search of the premises.

He learned that a train left for Plymouth in a few minutes, and travelling by it, he soon reached the police headquarters of that city. Here he was met by a superintendent, and the two men discussed the affair in detail.

‘I have done, I think, everything possible,’ the Superintendent concluded. ‘All the stations at a radius of about twenty miles or more have been advised, and the roads will be watched from Looe and Liskeard round by Launceston, Okehampton, and Moreton Hamstead, to Newton Abbott. All trains and steamers, as far as possible, will be examined before departure, and the railway people at the smaller stations will be advised. I don’t think he’ll make for Cornwall, you know. It’s too much of a dead end. He will either go east in his car, or come to Plymouth and try the trains, or even more likely, the steamers.’