As it turned out, Dr. Keller didn't need to accept her offer, but it represented "how his patients felt about him," Drake said.
Born in Wilmington, Dr. Keller graduated from Wilmington Friends School, Yale University, and the University of Pennsylvania School of Medicine, Class of 1965.
After an internship and residency at the Hospital of the University of Pennsylvania and two years at Pennsylvania Hospital, Dr. Keller joined the cardiology department at Bryn Mawr Hospital.
He was known for his comprehensive approach to patient care, which remained constant despite pressures within the medical field to shorten visits, his daughter said.
"He put the same amount of energy and hope into a 95-year-old patient with myriad health issues as he did a young person recovering from a heart attack," she said. Many patients saw him for 30 years or more.
Dr. Keller, who was board-certified in internal medicine and cardiology, was widely respected by his colleagues at Bryn Mawr, and had strong relationships with doctors, nurses, administration, and support staff. He had no intention of retiring.
Dr. Keller was a grandfather, and said it was "the best job around." He was a fixture on the sidelines at his grandchildren's sports events and in the audience at their school plays.
He enjoyed spending time at the family's vacation home on Lake George, N.Y., his daughter said, and playing with his black lab, Maggie.
Surviving besides his daughter are sons Blair and Andrew; another daughter, Grace; four grandchildren; and a brother. His wife Joanie B. and a granddaughter died earlier.
A memorial service was held Tuesday, Oct. 8.
Contributions may be made to the Bryn Mawr Hospital Foundation, Attn: Nursing Excellence Fund, 130 S. Bryn Mawr Ave., Bryn Mawr, Pa. 19010.