"We don't know," she told him in a very frigid voice.

"Don't know?" he repeated, almost sure now that they were mad. Surely an old woman and a young woman would know how they had entered a house if a child didn't. He excused Joan on account of her age but he did not excuse Granny nor Rebecca Mary. "You must know!" he told them with that unpleasant dictatorial impatient voice, although the man at his right touched his arm suggestively.

"Don't say 'must' to me!" Granny rather lost her temper. There is no doubt that bad manners are contagious. "Where is Mr. Cabot? I will make my explanation to him, although I think he owes me an apology." The ogre might have been but a speck of dust on the threshold from the way she looked beyond him.

"Mr. Cabot isn't here." The ogre's high and mighty manner began to slip from him.

"This is his house," began Granny, as if a man were always to be found at home.

"Not now——"

"He hasn't sold it?" Granny couldn't wait for him to put a period to his sentence. "Joshua Cabot never would sell his great-grandfather's house." She was so sure that he wouldn't that she stopped being indignant or cold and was just frankly curious.

The ogre looked as if he were not sure that it was any of her business what Joshua Cabot would do before he made a grudging explanation. "No, Mr. Cabot hasn't sold Riverside, but he has turned it over to us. We are making a very important experiment for the government and we cannot be disturbed."

Granny's manner changed at once. It became quite friendly. "In that case I shall tell you how we happened to disturb you." And she did tell them that she and Rebecca Mary and Joan had left Waloo in their automobile the night before and this morning they had found themselves in a shed at Riverside. But she never said a word of Rebecca Mary's dream.