ANDOVER, Mass. — C. Yardley Chittick sneaked off school grounds with Humphrey Bogart and other schoolmates, but Phillips Academy on Saturday let its oldest living graduate off the hook.

Attending his 90th high school reunion, the 107-year-old grinned from his golf cart at the head of the Andover school's alumni parade.

A 1918 graduate, Chittick, of Concord, N.H., also received a pardon from the school for some long-ago schoolboy mischief.

At a ceremony in the school chapel, Barbara Chase, the school's head, read a resolution from Phillips Academy's trustees that paid tribute to Chittick's life and service to the school.

It also noted that Chittick wrote in a 1918 diary entry that he'd sneaked off campus during a spring night with friends, including Bogart, to watch a fire in North Wilmington.

The group didn't return until 3 a.m.

"Now therefore, be it resolved that the trustees of Phillips Academy do hereby cancel all punishments long overdue for that escapade," the resolution read.

Chittick's uncle, a graduate of the Andover class of 1886, sent him to Andover a year after he flunked French at his Newark, N.J., high school. Chittick went on to graduate from the Massachusetts Institute of Technology and make a career in patent law. At one point, he refused a job offer from Thomas Edison, taking a job in the golf club industry instead because it sounded more fun.

Chittick has taken part in alumni exercises at Andover for several years, said Michael Ebner, the school's director of alumni relations.

He said that Chittick's stories of student life — rushing to class and playing sports — remind people many things at Andover haven't changed.

"(His visit) is a living is embodiment of the history of the school," Ebner said. "It makes everyone see things change, and see they remain the same."