"Very well," he said, "I appeal to Wilson."

And Wilson, nothing loth, enunciated his definition of Knowledge.

"Knowledge," he said, "is the description and summing up in brief formulæ of the routine of our perceptions."

"There!" I exclaimed. "No one, I suppose, would identify that with Good?"

"But"—objected Dennis—"in the first place, I don't understand the definition; and, in the second place, I don't agree with it."

"As to understanding it," replied Wilson, "there need be no difficulty there. You have only to seize clearly one or two main positions. First, that Knowledge is of perceptions only, not of things in themselves; secondly, that these perceptions occur in fixed routines; thirdly ..."

"But," interrupted Dennis, "what is a perception? I suppose it's a perception of something?"

"No," he said, "I don't know that it is."

"What then? Simply a state in me?"

"Very likely."