Bob died Feb. 21, 2021, in Springfield, Mass., just short of his 96th birthday. 

He entered Princeton from Quincy High School, following his father George Hubert Bonsall 1915 and brother George Hubert Bonsall Jr. ’45. Initially a liberal arts major, Bob earned a degree in chemical engineering, graduating with election to Phi Beta Kappa. 

He worked for the National Fireman’s Insurance Co. while pursuing graduate work at MIT. In 1950 he married Dorothy Hussey, to whom he remained devotedly married for 68 years until her death in 2019. 

In 1951 Bob joined the Brown Paper Co., in Berlin, N.H., before relocating to Wilbraham, Mass., in 1960 to join Foam Corp. Soon afterward, he joined Monsanto, where he was a chemical engineer in research and development until he retired in 1988. 

A Wilbraham resident of 58 years, Bob was active in town affairs. He served for several years as chairman of the Water Board and was town assessor from 1989 to 1997. A devoted father of five children, he was a lover of nature, history, and genealogy. A proud Princetonian, he and his wife enjoyed many Princeton reunions. In retirement, he traveled abroad extensively in pursuit of a deeper understanding of his ancestral roots. 

Bob was predeceased by his son George and siblings George Bonsall and Mary Ellen Guptill. He is survived by his daughter, Robin B. Stedman ’75 and her husband, Peter ’75; son Roger and his wife, Jeanne; son Robert Jr. and his wife, Ann Marie; son Bruce and his wife, Denise; and grandchildren Crystal, Ryan, Sarah, Collin ’15, Benjamin, Meredith, Kristen, and Matthew.

Undergraduate Class of 1947