At St. Paul’s School in Concord, N.H., he participated in football, crew, and student government. At Princeton, he majored in Oriental languages and literatures, joined Colonial Club, and was active in The Princeton Tiger.
He married Barbara Massey in June 1955, their courtship having begun in 1951 during a chaperoned summer tour of Italy.
Quartie earned a law degree at the University of Pennsylvania in 1957, was admitted to the bar, and began a successful 40-year practice at Dechert Price & Rhoads in estates and trusts (or, as he once put it, “pre-mortems and post-mortems”). Great-grandson of the founder of Philadelphia’s Strawbridge & Clothier department store, he served on its board for almost 20 years.
Shortly after Quartie’s retirement, upon the tragic death of their recently divorced daughter Melinda, he and Barbara took her three children into their home and raised them to adulthood. Throughout, Quartie was engaged in numerous community activities and deeply involved in the life of his church.
He is survived by his wife of 66 years, Barbara Massey Clothier; his son, Isaac H. Clothier V; his daughter Rebecca Clothier Case; eight grandchildren; and one great-grandchild. He was predeceased by his daughter Melinda Clothier Biddle and his two brothers.