“A second question,” continued Moon, comparatively curtly. “You said there were other cases of the accused trying to kill people. Why have you not got evidence of them?”

The American planted the points of his fingers on the table again. “In those cases,” he said precisely, “there was no evidence from outsiders, as in the Cambridge case, but only the evidence of the actual victims.”

“Why didn’t you get their evidence?”

“In the case of the actual victims,” said Pym, “there was some difficulty and reluctance, and—”

“Do you mean,” asked Moon, “that none of the actual victims would appear against the prisoner?”

“That would be exaggerative,” began the other.

“A third question,” said Moon, so sharply that every one jumped. “You’ve got the evidence of the Sub-Warden who heard some shots; where’s the evidence of the Warden himself who was shot at? The Warden of Brakespeare lives, a prosperous gentleman.”

“We did ask for a statement from him,” said Pym a little nervously; “but it was so eccentrically expressed that we suppressed it out of deference to an old gentleman whose past services to science have been great.”

Moon leaned forward. “You mean, I suppose,” he said, “that his statement was favourable to the prisoner.”

“It might be understood so,” replied the American doctor; “but, really, it was difficult to understand at all. In fact, we sent it back to him.”