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Rh independent research on my part would be the most beneficial to science in the end. Then, however, it was reported that Sir Walter had been taking the Campton water, and had derived some benefit from it; the project for developing the property was again raised, and the moment seemed an auspicious one for me to identify myself prominently with the subject. Doubtless I had referred to the work I had taken in hand to Henry in Bobbie’s hearing, for during the first few days the boy had been persistent in his usual vein.

"Oh, uncle, you'll let me help you with the analysis, won't you?" he had cried excitedly, as soon as his father had gone, and even my reply that the work was of far too delicate a kind to be entrusted in any detail to the rough-and-ready practice of a school-boy did not repress him.

"Well, I suppose you have to be awfully careful about it," he admitted frankly. "Never mind, uncle; perhaps I can be doing something else while you are on that."

"You have to be very careful indeed," I said impressively. "Sometimes it is necessary to make repeated tests for so minute a quantity as a thousandth part of a grain—perhaps a mere speck to the naked eye—in a gallon of water."

"Yes," he replied, nodding carelessly. "Jehnsen's gold test reveals .0004 of a grain to the gallon."

I suppose these smatterings of general information are taught nowadays in the lower forms as "Nature Study." I dislike the system, and would have shown Bobbie how little real use a single superficial fact like that was when he suddenly went off on another line.

"Oh, I say, uncle," he exclaimed, "do you expect to find anything new in the Campton water? How spiffing if you do! What shall you call it? Have you got anything yet?"

"My good nephew," I said, "it is necessary to use com-