"Was the window shut or open?"

"Shut, sir; and the most extraordinary thing was that it was snibbed too! That's what made the master say it couldna have been a burglar at all, or how did he snib the window after he went out again?"

"Then Mr. Rattar didn't believe it was a burglar?"

"N--no, sir," said Mary, a little reluctantly.

"Was anything stolen?"

"No, sir; that was another funny thing. But it must have been a burglar!"

"What about the other windows, and the doors? Were they all fastened in the morning?"

"Yes, sir, it's the truth they were," she admitted.

"And what did Mr. Rattar do with the piece of mud?"

"Just threw it out of the window."

The sympathetic stranger crossed to the window and looked out.

"Gra.s.s underneath, I see," he observed. "No footprints outside, I suppose?"

"No, sir."

"Did the police come down and make enquiries?"

"Well, sir, the master said he would inform the pollis, but then came the news of the murder, and no one had any thoughts for anything else after that."

The sympathetic visitor stood by the window very thoughtfully for a few moments, and then turned and rewarded her with the most charming smile.

"Thank you awfully for showing me all this," said he. "By the way, what's your name?" She told him and he added with a still nicer smile, "Thank you, Mary!"

They returned to the library and he sat down before the table again, but just as he was going to pick up the pen a thought seemed to strike him.

"By the way," he said, "I remember hearing something about the loss of a ring. The burglar didn't take that, did he?"

"Oh, no, sir, I remember the advertis.e.m.e.nt was in the paper before the night of the burglary."

He opened his eyes and then smiled.

"Brilliant police you've got!" he murmured, and took up the pen again.

"There was another burglar here and he might have taken it!" said Mary in a low voice.

The visitor once more dropped the pen and looked up with a start.

"Another burglar!" he exclaimed.

"Well, sir, this one didn't actually burgle, but--"

She thought of the master if he chanced to learn how she had been gossiping, and her sentence was cut short in the midst.

"Yes, Mary! You were saying?" cooed the persuasive visitor, and Mary succ.u.mbed again and told him of that night when a shadow moved into the trees and footprints were left in the gravel outside the library window, and the master looked so strangely in the morning. Her visitor was so interested that once she began it was really impossible to stop.

"How very strange!" he murmured, and there was no doubt he meant it.

"But about the master's ring, sir--" she began.

"You say he looked as though he were being _watched_?" he interrupted, but it was quite a polite and gentle interruption.

"Yes, sir; but the funny thing about losing the ring was that he never could get it off his finger before! I've seen him trying to, but oh, it wouldn't nearly come off!"

Again he sat up and gazed at her.

"Another mystery!" he murmured. "He lost a ring which wouldn't come off his finger? By Jove! That's very rum. Are there any more mysteries, Mary, connected with this house?"

She hesitated and then in a very low voice answered:

"Oh, yes, sir; there was one that gave me even a worse turn!"

By this time her visitor seemed to have given up all immediate thoughts of writing his note to Mr. Rattar. He turned his back to the table and looked at her with benevolent calm.

"Let's hear it, Mary," he said gently.

And then she told him the story of that dreadful night when the unknown visitor came for the box of old papers. He gazed at her, listening very attentively, and then in a soothing voice asked her several questions, more particularly when all these mysterious events occurred.

"And are these all your troubles now, Mary?" he enquired.

He asked so sympathetically that at last she even ventured to tell him her latest trouble. Till he fairly charmed it out of her, she had shrunk from telling him anything that seemed to reflect directly on her master or to be a giving away of his concerns. But now she confessed that Mr.

Rattar's conduct, Mr. Rattar's looks, and even Mr. Rattar's very infrequent words had been troubling her strangely. How or why his looks and words should trouble her, she knew not precisely, and his conduct, generally speaking, she admitted was as regular as ever.

"You don't mean that just now and then he takes a wee drop too much?"

enquired her visitor helpfully.

"Oh, no, sir," said she, "the master never did take more than what a gentleman should, and he's not a smoking gentleman either--quite a principle against smokers, he has, sir. Oh, it's nothing like that!"

She looked over her shoulder fearfully as though the walls might repeat her words to the master, as she told him of the curious and disturbing thing. Mr. Rattar had been till lately a gentleman of the most exact habits, and then all of a sudden he had taken to walking in his garden in a way he never did before. First she had noticed him, about the time of the burglary and the removal of the papers, walking there in the mornings. That perhaps was not so very disturbing, but since then he had changed this for a habit of slipping out of the house every night--every single night!

"And walking in the garden!" exclaimed Mr. Carrington.

"Sometimes I've heard his footsteps on the gravel, sir! Even when it has been raining I've heard them. Perhaps sometimes he goes outside the garden, but I've never heard of anyone meeting him on the road or streets. It's in the garden I've heard the master's steps, sir, and if you had been with him as long as I've been, and knew how regular his habits was, you'd know how I'm feeling, sir!"

"I do know, Mary; I quite understand," Mr. Carrington a.s.sured her in his soothing voice, and there could be no doubt he was wondering just as hard as she.

"What o'clock does he generally go out?" he asked.

"At nine o'clock almost exactly every night, sir!"