am not entirely free yet, you know. Two hours is the most that I
can give you; and not entirely that. There are some details that
may not be neglected. It is a far venture and now that we have
succeeded this far there is surely no reason why we cannot go on.
However, it is necessary that I return to the house on Chatterton
Place. I have but slightly over an hour left."

The doctor was plainly disappointed.

"But the lecture?"

"It means my life, professor, and the subsequent success of our
experiment. A few details, a few minutes. Perhaps if we hurry we
can get back in time."

The doctor glanced at his watch. "Twenty minutes for the train,
twenty minutes for the boat, ten minutes; that's an hour, two
hours. These details? Have you any idea how long, Rhamda?"

"Perhaps not more than fifteen minutes."

"We have still two hours. Fifteen minutes; perhaps a little bit
late. Tell you what. I shall go with you. You can get on the
boat."

We have said that the detective had intuition. He had it still.
Yet he had no rational reason for suspecting either the professor
or his strange companion. Furthermore he had never heard of the
Blind Spot in any way whatsoever; nor did he know a single thing
of philosophy or anything else in Holcomb's teaching. He knew the