He would now and then back up certain crazy hints by exhibiting objects which utterly nonplussed me—elusively coloured and bafflingly textured objects like nothing ever heard of on earth, whose insane curves and surfaces answered no conceivable purpose and followed no conceivable geometry. These things, he said, came ‘from outside’; and his wife knew how to get them. Sometimes—but always in frightened and ambiguous whispers—he would suggest things about old Ephraim Waite, whom he had seen occasionally at the college library in the old days. These adumbrations were never specific, but seemed to revolve around some especially horrible doubt as to whether the old wizard were really dead—in a spiritual as well as corporeal sense.
     At times Derby would halt abruptly in his revelations, and I wondered whether Asenath could possibly have divined his speech at a distance and cut him off through some unknown sort of telepathic mesmerism—some power of the kind she had displayed at school.

The Thing on the Doorstep Chapter 3