Roger Chillingworth readily assented, and went on with his medical supervision of the minister; doing his best for him, in all good faith, but always quitting the patient’s apartment, at the close of the professional interview, with a mysterious and puzzled smile upon his lips.
There are no more uses of "assent" in the book.
Show samples from other sources
She takes my silence as assent.
Sabaa Tahir -- An Ember in the Ashes
Their murmurs of assent and disapproval gave her a sense of order and rightness.