Mrs. Curtis and her guests were rather surprised when a hotel boy came up to her sitting room to say that Mr. Theodore Brown and some one else would like to speak to Mr. Tom Curtis for a few minutes, if that were possible.
Tom came back to his mother a little later, his eyes flashing. He related a part of Mr. Brown's story.
"If you don't mind, Mother, I think we had better have the fellow up here for the girls to see. I know he is the man who took the sailboat from Madge and me, and Mr. Brown says he is the fellow who attempted to rob the houseboat; but whether he has set it afire and nearly been the death of Mollie, we have no way of finding out. He vows he has not been near the houseboat since the day he promised never to return. If we cross-examine him up here, perhaps we can get at the truth."
Eleanor had slipped out of the room to find her coat and hat as soon as she learned of the accident to Mollie. The other young women were trembling with sympathy and alarm, but they waited to see the boy brought upstairs.
The girls were not long in agreeing to the identity of the prisoner as the evil genius of their past experiences. But there was no way of proving that he had actually set fire to the houseboat, for he still absolutely denied all knowledge of it.
Eleanor came back to the sitting-room. "Aren't you ready to leave, girls?" she demanded. "Miss Jenny Ann and Mollie need us."
Eleanor sniffed the air daintily. "What is that curious odor of kerosene, Mrs. Curtis?" she inquired curiously. "Do you think any of the lamps could be leaking?"
"Good!" Mr. Brown ejaculated. "What a chump I am! I have been conscious of that smell all this time and had not associated it with the houseboat."
Mr. Brown put his nose down to his prisoner's hands. Then he inhaled the scent of his coat. Tom Curtis followed suit. The odor was unmistakable. The lad was well smeared with oil. The circumstantial evidence was strong against the captured boy when Mr. Brown related the discovery of the overturned can and the spread of the kerosene on the houseboat deck.
"I am awfully sorry to have made this scene, Mrs. Curtis," apologized the young artist, "but I knew no other way for us to settle the matter at once. This young man has done too much mischief to our friends to be allowed to go free again. But you need not think further of the experience, I'll take the lad and give him up to the police to-night. Your son and I will be able to identify him. It will not be necessary to draw you girls into the business. We can manage without you."