As a "professor" I always felt myself a sham, with its chief duties of being a walking encyclopedia of erudition.
He knew precisely what she would say; Ann was a kind of walking encyclopedia of the conventions.
A walking encyclopedia cannot work for want of room to turn round in his own head.
I found her most intelligent and so far as my career on and off the stage was concerned she was a walking encyclopedia.
Blind Tom's memory was a blank on most subjects, but he was a walking encyclopedia on music.