“Only Miss Violet.” “No strangers of any kind been inside this room?” “No sir.” “You forget the workmen, Jim,” his wife reminded him. “Workmen?” Poirot wheeled round on her. “What workmen?” The woman explained that about two years and a half ago workmen had been in the house to do certain repairs. She was quite vague as to what the repairs were. Her view seemed to be that the whole thing was a fad of her master’s, and quite unnecessary. Part of the time the workmen had been in the study, but what they had done there she could not say, as her master had not let either of them into the room while the work was in progress. Unfortunately they could not remember the name of the firm employed, beyond the fact that it was a Plymouth one. “We progress, Hastings,” said Poirot, rubbing his hands, as the Bakers left the room. “Clearly he made a second will, and then had workmen from Plymouth in to make a suitable hiding-place. Instead of wasting time, taking up the floor and tapping the walls, we will go to Plymouth.” With a little trouble we were able to get the information we wanted. And after one or two essays, we found the firm employed by Mr. Marsh. Their employees had all been with them many years, and it was easy to find the two men who had worked under Mr. Marsh’s orders. They remembered the job perfectly. Among various other minor jobs, they had taken up one of the bricks of the old-fashioned fireplace, made a cavity beneath, and so cut the brick that it was impossible to see the joint. By pressing on the second brick from the end, the whole thing was raised. It had been quite a complicated piece of work, and the old gentleman had been very fussy about it. Our informant was a man called Coghan, a big, gaunt man with a grizzled mustache. He seemed an intelligent fellow. We returned to Crabtree Manor in high spirits, and locking the study door, proceeded to put our newly acquired knowledge into effect. It was impossible to see any sign on the bricks, but when we pressed in the manner indicated, a deep cavity was at once disclosed. Eagerly Poirot