Finley's first wife, Sarah Hall, was the sister of Susanna Hall Harvey, the mother of Dr. Benjamin Rush, a signer of the Declaration of Independence. Benjamin Rush moved into the Finley home at the age of six (some sources say eight) upon the death of his father, and was one of Finley's students at West Nottingham Academy. Finley is said to have convinced Rush to become a physician. Rush later attended Finley as his physician at the time of his death.
