The sensation among the tradesmen caused by the invasion was, as may be imagined, immense and painful. The thing was a public disaster. It resembled the advent of a fox in a fowl-run. For years the tradesmen of Wrykyn had jogged along in their comfortable way, each making his little profits, with no thought of competition or modern hustle. And now the enemy was at their doors. Many were the gloomy looks cast at the gaudy building as it grew like a mushroom. It was finished with incredible speed, and then advertisements began to flood the local papers. A special sheaf of bills was despatched to the school. Dunstable got hold of one, and read it with interest. Then he went in search of his friend Linton to find out what he thought of it. Linton was at work in the laboratory. He was an enthusiastic, but unskilful, chemist. The only thing he could do with any real certainty was to make oxygen. But he had ambitions beyond that feat, and was continually experimenting in a reckless way which made the chemistry master look wan and uneasy. He was bending over a complicated mixture of tubes, acids, and Bunsen burners when Dunstable found him. It was after school, so that the laboratory was empty, but for them. "Don't mind me," said Dunstable, taking a seat on the table. "Look out, man, don't jog. Sit tight, and I'll broaden your mind for you. I take this bit of litmus paper, and dip it into this bilge, and if I've done it right, it'll turn blue." "Then I bet it doesn't," said Dunstable. The paper turned red. "Hades," said Linton calmly. "Well, I'm not going to sweat at it any more. Let's go down to Cook's." Cook's is the one school institution which nobody forgets who has been to Wrykyn. It is a little confectioner's shop in the High Street. Its exterior is somewhat forbidding, and the uninitiated would probably shudder and pass on, wondering how on earth such a place could find a public daring enough to support it by eating its wares. But the school went there in flocks. Tea at Cook's was the alternative to a study tea. There was a large room at the back of the shop, and here oceans of hot tea and tons of toast were consumed. The staff of Cook's consisted of Mr. Cook, late sergeant in a line regiment, six foot three, disposition amiable, left leg cut off above the knee by a spirited Fuzzy in the last Soudan war; Mrs. Cook, wife of the above, disposition similar, and possessing the useful gift of being able to listen to five people at one and the same time; and an invisible menial, or menials, who made toast in some nether region at a perfectly dizzy rate of speed. Such was Cook's. "Talking of Cook's," said Dunstable, producing his pamphlet, "have you seen this? It'll be a bit of a knock-out for them, I should think." Linton took the paper, and began to read. Dunstable roamed curiously about the laboratory, examining things.