of the water, was to give motion to machinery for tolling

"Well," he said, "I believe some people make claims to quite a number, and perhaps almost every one owns to a Dr. Jekyll and a Mr. Hyde."

"Never mind, David. I don't think you know the gentlemen, anyhow. They're only something like the little girl with a curl. One is very, very good, indeed, and the other is horrid."

"Oh, yes, I know them; they're the ones that come to me," returned David, with a sigh. "I've had them a lot, lately."

"Yes; and that's what's the trouble. How can you drive them off--the one that is bad, I mean?"

"Well, really," confessed Mr. Jack, "I'm not sure I can tell. You see--the gentlemen visit me sometimes."

"I'm so glad--that is, I mean," amended David, in answer to Mr. Jack's uplifted eyebrows, "I'm glad that you understand what I'm talking about. You see, I tried Perry Larson last night on it, to get him to tell me what to do. But he only stared and laughed. He didn't know the names of 'em, anyhow, as you do, and at last he got really almost angry and said I made him feel so 'buggy' and 'creepy' that he wouldn't dare look at himself in the glass if I kept on, for fear some one he'd never known was there should jump out at him."

"Well, I suspect, David, that Perry knew one of your gentlemen by the name of 'conscience,' perhaps; and I also suspect that maybe conscience does pretty nearly fill the bill, and that you've been having a bout with that. Eh? Now, what is the trouble? Tell me about it."

David stirred uneasily. Instead of answering, he asked another question.