"I s'pose," she went on, "that I shouldn't a' done it, but I didn't scent anything wrong then. Mrs. Robson went home in a few minutes, and then I roused my little girl up and took her in and put her to bed. She was asleep again a'most as soon as her head touched the pillow, and the night was so pleasant-like that I threw my shawl on my shoulders and went out onto the front stoop. I felt sort o' lonesome in the house all alone."

"Of course," commented Ferrars, seeing the dread of their criticism or displeasure that was manifest in her face as she paused and looked from one to the other. "One naturally would in your place."

"Yes, I suppose so," she went on, reassured. "Well, I hadn't been out there two minutes when that same boy came running up the walk, all out of breath, and says, sort of panting between words, 'Ma'am, the lady that lives next the engine-house by the corner stopped me just now an' asked me to come back here an' beg you to come down there quick! Her little boy's got himself burned awful!'"

"Ah! I see!" Ferrars spoke low, as if to himself, and his face wore the look of one who is beginning to understand a riddle. "You went, of course?"

"Yes, I went."

"Go on with the story, please. Tell it all as you have begun. Let us have the details," and he again nodded toward the doctor, who was regarding him with profound surprise, and put a finger to his lip.

"My sister-in-law lives in the house by the engine-house," Mrs. Fry hurried on, "and knowing how careless she is about keepin' things in the house against such times, I ran back into my bedroom and got a bottle of camphor and a roll of cotton batt. 'Run ahead, boy,' I says to the boy, 'an' tell her I am coming; I must lock up my doors and winders.' 'She's in an awful hurry,' he says, 'cryin' fit to kill. I'll set right down here and watch your house, ma'am; I can do no good there.' The boy spoke so honest, and Mary's boy is such a dear little fellow, that I jest lost my head complete, and ran off down the sidewalk. At the corner I looked back. The boy was sittin' on the doorstep, an' I heard him whistlin'; someway it made me feel quite easy. But when I got to the house and found them all in the sitting-room, and Neddy not hurt at all, but sound asleep on the floor, I was so took back that I just dropped down on a chair and acted like a wild woman. Instead of rushin' back that very minute, I sat there and told how I had been tricked, and scolded about that boy, an' vowed I'd have him well punished, and so on, until Mary reminded me that I'd better get back home and see if the house was all right, or if 'twas only a boy's trick."

"It looked like one, surely," was the detective's easy comment.

"That's what Mr. Jones said. He's my neighbour. He was just going home, and we overtook him. Mary told him about the boy and he laughed and said that some boys had played that sort of trick last summer two or three times, sending people running across the town on some such fool's errand. He thought maybe 'twas some boy that I had offended some way; and then I thought about how crisp I was about givin' the boy Mr. Brierly's key, and it made me feel sort of easier. But Mr. Jones went in with us when we got to my house. We looked all around downstairs and everything was all right. Nellie was fast asleep still, and not a thing had been disturbed. Then we went upstairs, 'just for form's sake,' Mr. Jones said, and looked in all the bedrooms, and even tried Mr. Brierly's door. Everything seemed right, and so Mr. Jones and Mary went away, and I went to bed. But someway I couldn't sleep sound. I felt provoked and angry about that boy, and the more I thought of him, of his being a stranger and all, the uneasier I got. Then I began to imagine I heard queer sounds, and creaking doors, and, right on the heels of all that, came a loud slam that waked Nellie, and made me skip right out of bed."

"A shutter, of course," said the doctor, as she paused for breath.