The reply was in a voice that sounded peevish rather than surprised. “Tt-tt-tt, well, there, I never!”

Mrs Porter went over to where her father was standing, and they continued talking in a lower key. Mr Davidson saw plainly that something not quite in the common run was under discussion; so he came down the gallery stairs and joined them. There was no sign of disorder in the chancel any more than in the rest of the Chapel, which was beautifully clean; but the eight folio Prayer-Books on the cushions of the stall-desks were indubitably open.

Mrs Porter was inclined to be fretful over it. “Whoever can it be as does it?” she said: “for there’s no key but mine, nor yet door but the one we came in by, and the winders is barred, every one of ’em; I don’t like it, father, that I don’t.”

“What is it, Mrs Porter? Anything wrong?” said Mr Davidson.

“No, sir, nothing reely wrong, only these books. Every time, pretty near, that I come in to do up the place, I shuts ’em and spreads the cloths over ’em to keep off the dust, ever since Mr Clark spoke about it, when I first come; and yet there they are again, and always the same page—and as I says, whoever it can be as does it with the door and winders shut; and as I says, it makes anyone feel queer comin’ in here alone, as I ’ave to do, not as I’m given that way myself, not to be frightened easy, I mean to say; and there’s not a rat in the place—not as no rat wouldn’t trouble to do a thing like that, do you think, sir?”

“Hardly, I should say; but it sounds very queer. Are they always open at the same place, did you say?”

“Always the same place, sir, one of the psalms it is, and I didn’t particular notice it the first time or two, till I see a little red line of printing, and it’s always caught my eye since.”

Mr Davidson walked along the stalls and looked at the open books. Sure enough, they all stood at the same page; Psalm cix., and at the head of it, just between the number and the Deus laudum, was a rubric, “For the 25th day of April.” Without pretending to minute knowledge of the history of the Book of Common Prayer, he knew enough to be sure that this was a very odd and wholly unauthorized addition to its text; and though he remembered that April 25 is St Mark’s Day, he could not imagine what appropriateness this very savage psalm could have to that festival. With slight misgivings he ventured to turn over the leaves to examine the title-page, and knowing the need for particular accuracy in these matters, he devoted some ten minutes to making a line-for-line transcript of it. The date was 1653; the printer called himself Anthony Cadman. He turned to the list of proper psalms for certain days; yes, added to it was that same inexplicable entry: For the 25th day of April: the 109th Psalm. An expert would no doubt have thought of many other points to inquire into, but this antiquary, as I have said, was no expert. He took stock, however, of the binding—a handsome one of tooled blue leather, bearing the arms that figured in several of the nave windows in various combinations.

“How often,” he said at last to Mrs Porter, “have you found these books lying open like this?”

“Reely I couldn’t say, sir, but it’s a great many times now. Do you recollect, father, me telling you about it the first time I noticed it?”