“For which the latest thing is the radium water cure, I suppose?” ventured Kennedy.

“Well, radioactive water is one cure for hardening of the arteries. But I didn’t say he had hardening of the arteries. Still, he is taking the water, with good results. You are from the company?”

Kennedy nodded.

“It was the radium water that first interested him in it. Why, we found a pressure of 230 pounds, which is frightful, and we have brought it down to 150, not far from normal.”

“Still that could have nothing to do with the sore on his neck,” hazarded Kennedy.

The Doctor looked at him quickly, then ahead at the path of light which his motor shed on the road.

He said nothing, but I fancied that even he felt there was something strange in his silence over the new complication. He did not give Kennedy a chance to ask whether there were any other such sores.

“At any rate,” he said, as he throttled down his engine with a flourish before the pretty little Glenclair station, “that girl needn’t worry.”

There was evidently no use in trying to extract anything further from him. He had said all that medical ethics or detective skill could get from him. We thanked him and turned to the ticket window to see how long we should have to wait.

“Either that doctor doesn’t know what he is talking about or he is concealing something,” remarked Craig, as we paced up and down the platform. “I am inclined to read the enigma in the latter way.”