"That's for you to decide," said Mr. Flinders. "But how you've got to look at it is like this: When this stone, which you have improperly sealed up, opened, it made a noise which could be heard all over the house. Following on that, the person or persons that nefariously broke into the Priory by that way couldn't do it without you knowing. That's fact, that is. The police have to work on facts, sir, and nothing else. Now you say that when this picture fell down you hadn't heard that stone open. From which it follows that no person or persons did open it that night. That's logic, isn't it, sir?"

"I'll take your word for it," said Charles. "And here's a second way for you to look at it: It is just possible that there is another entrance to the Priory which we don't know anything about."

Chapter Five

The immediate effect of the visit to Constable Flinders was a visit to the Priory paid by that worthy individual the very next day. Celia received him with a flattering display of relief, and the constable, a shy man, flushed very red indeed when she told him she was sure everything would be cleared up now that he had taken the matter in hand. However, he knew that she spoke no less than the truth, and said as much. He then requested her to show him the priest's hole.

"I will, of course," she said, "but I wish my husband or my brother were in, because I can hardly bear to open that ghastly panel."

Following her delicately up the stairs Mr. Flinders said that he could quite understand that. When she had succeeded in locating the rosette which worked the panel, and had twisted it round, he peered inside the dark recess almost as fearfully as Celia herself. There was nothing there, but it smelted strongly of Lysol. After deliberating for a while, the constable announced his intention of climbing into the hole. He succeeded in doing this, not without inflicting several scratches on the panelling, and once inside he very carefully inspected the walls. Celia watched him hopefully, and wondered whether the scratches could be got rid of.

Mr. Flinders climbed out again, and picked up his helmet from the floor where he had placed it. "Nothing there, madam," he said.

"What were you looking for?" inquired Celia.

"There might have been a way in," explained Mr. Flinders. "Not that I think so meself," he added, "but the police have to follow everything up, you see."

"Oh!" said Celia, a little doubtfully. She closed the panel again. "Is there anything else you'd like to see upstairs?"