I could easily receive it by writing to the postmaster if I happened to be away from the town when it arrived.

The coffee-room of the hotel, as it grew late in the evening, became a perfect solitude. I was left to reflect on what I had accomplished that afternoon as uninterruptedly as if the house had been my own. Before I retired to rest I had attentively thought over my extraordinary interview with Mrs. Catherick from beginning to end, and had verified at my leisure the conclusions which I had hastily drawn in the earlier part of the day.

The vestry of Old Welmingham church was the starting-point from which my mind slowly worked its way back through all that I had heard Mrs. Catherick say, and through all I had seen Mrs. Catherick do.

At the time when the neighbourhood of the vestry was first referred to in my presence by Mrs. Clements, I had thought it the strangest and most unaccountable of all places for Sir Percival to select for a clandestine meeting with the clerk’s wife. Influenced by this impression, and by no other, I had mentioned “the vestry of the church” before Mrs. Catherick on pure speculation—it represented one of the minor peculiarities of the story which occurred to me while I was speaking. I was prepared for her answering me confusedly or angrily, but the blank terror that seized her when I said the words took me completely by surprise. I had long before associated Sir Percival’s Secret with the concealment of a serious crime which Mrs. Catherick knew of, but I had gone no further than this. Now the woman’s paroxysm of terror associated the crime, either directly or indirectly, with the vestry, and convinced me that she had been more than the mere witness of it—she was also the accomplice, beyond a doubt.

What had been the nature of the crime? Surely there was a contemptible side to it, as well as a dangerous side, or Mrs. Catherick would not have repeated my own words, referring to Sir Percival’s rank and power, with such marked disdain as she had certainly displayed. It was a contemptible crime then and a dangerous crime, and she had shared in it, and it was associated with the vestry of the church.

The next consideration to be disposed of led me a step farther from this point.

Mrs. Catherick’s undisguised contempt for Sir Percival plainly extended to his mother as well. She had referred with the bitterest sarcasm to the great family he had descended from—“especially by the mother’s side.” What did this mean?

There appeared to be only two explanations of it. Either his mother’s birth had been low, or his mother’s reputation was damaged by some hidden flaw with which Mrs. Catherick and Sir Percival were both privately acquainted? I could only put the first explanation to the test by looking at the register of her marriage, and so ascertaining her maiden name and her parentage as a preliminary to further inquiries.

On the other hand, if the second case supposed were the true one, what had been the flaw in her reputation? Remembering the account which Marian had given me of Sir Percival’s father and mother, and of the suspiciously unsocial secluded life they had both led, I now asked myself whether it might not be possible that his mother had never been married at all. Here again the register might, by offering written evidence of the marriage, prove to me, at any rate, that this doubt had no foundation in truth. But where was the register to be found? At this point I took up the conclusions which I had previously formed, and the same mental process which had discovered the locality of the concealed crime, now lodged the register also in the vestry of Old Welmingham church.

These were the results of my interview with Mrs. Catherick—these were the various considerations, all steadily converging to one point, which decided the course of my proceedings on the next day.