William L. Barclay III ’51

Tim graduated from Scarsdale High School in New York. At Princeton, he majored in public affairs in SPIA, was editor of Yacht Club Flashes, commodore of Yacht Club, and a member of Elm Club. He was roommates with Frank Rogers, Robert Rogers, and William Schaller. 

Upon graduation Tim served three years in the Navy. He received his Ed.M. in science education from Harvard. He was a dedicated math and science educator at Darrow School in the Berkshires, Commonwealth School in Boston, and headmaster of Cambridge Friends School. Tim was an original member of the Elementary Science Study program at MIT, developing curriculum and teacher training. He was an avid birdwatcher, tennis player, recorder player, sailor, and activist for environmental and social justice.  

Tim died April 7, 2026, at home. He was predeceased by his first wife, Ann; his partner, Antonia; and his second wife, Elizabeth. He is survived by his children William, Mary, David, and Jeanne.