Which preposition to use with farquhar

in Occurrences 1%

Wilks, who was to play Archer, spoke of this criticism to Farquhar in the course of a visit to the dying playwright.

unto Occurrences 1%

He was faithful to Mistress Farquhar unto the end, but who shall say that he had forgotten the old days which began so fairly at the Mitre Tavern?

Which preposition to use with  farquhar