And then she saw a queer thing. The chair in which Katy Summers sat was moving rapidly of its own accord straight toward the front door. Katy was too startled to move, and there she sat, grasping the arms of the chair, until it reached the doorsill. When it touched the sill, the chair stopped and gently tilted itself forward, making Katy slide out, whether she would or no. “Well, I never!” said Katy with a gasp. “If that isn’t the impolitest chair I ever saw!” “Oh, Katy!” cried Mary, flying down the stairs. “I am so sorry. We didn’t know it was that kind of chair. We hadn’t cleaned the hall yet, so we never suspected. It must be another of Aunt Nan’s jokes. She probably had this made so that peddlers or agents who got inside and insisted on waiting to see her would be discouraged. Please don’t blame us!” Then down came Mrs. Corliss, with Katy’s basket in her hand. “What a reception to our first caller!” she said with a rueful smile. “And you came on such a kind errand, too! But you must try to forget, little neighbor, that this was ever an inhospitable house, and come to see us often. We are going to change many things.” “Yes, indeed, I shall come again,” said Katy Summers. “I hope that Mary and I shall be in the same class at High School.” “So do I,” said Mary. “I begin to-morrow. Will you call for me so that I can have some one to introduce me on my first day?” “Yes,” said Katy, with a roguish look, “if you’ll let me wait for you in the garden.” Mary turned red. “You needn’t be afraid,” she said. “We won’t let those things happen any more, will we, Mother?” “No,” said Mrs. Corliss. “We will have the carpenter attend to those ‘jokes’ at once.” But until the carpenter came John had a beautiful time riding down the front hall on the inhospitable chair, and making the automatic butler cry, “Not at home.” John thought it a great pity to change these ingenious devices which made the front hall of Aunt Nan’s house so interesting. But he was in the minority, and that very afternoon the carpenter took away an electric device from the old armchair, which ended its days of wandering forever. And instead of the “bell” he put an old-fashioned knocker on the front door. CHAPTER IV THE BOOKS The town of Crowfield was built on a swift-flowing river with a waterfall, which gave it strong water-power. So the houses were easily fitted with electricity. Even the old Corliss mansion was up to date in that respect, at least. This was why Aunt Nan had been able to carry out her liking for queer devices and unexpected mechanical effects, as Mr. Griggs, the carpenter, explained when he came to make more hospitable the front hall. He chuckled over the moving chair, the secret of which was a spring concealed under one of the brass nail-heads. Any one who sat down and leaned back was sure to press this button, whereupon the chair would begin to move.