As stalwart supporters of maintaining strong House identities, the Bosserts had also been vocal and consistent opponents of randomization, the policy which disallowed choice for upper-class housing beginning with the class of 1999.

But despite their opposition, Dean of the College Harry R. Lewis '68, who co-authored the advisory report that advocated randomization, praised the Bosserts' legacy in Lowell House.

"They truly set the standard for dedication to the House as the living community that means so much to Harvard students," Lewis wrote in an e-mail message. "The Bosserts...will go down in Harvard annals as legends."

Over the next year, the Bosserts said they plan to travel extensively throughout Europe and have rented a house for two months in Burgundy, France.

"We're going to eat and drink a lot," William Bossert joked.

Defining Leverett

Following the lead of their more senior colleagues, the Dowlings announced in January that they too would step down as Masters of Leverett House after 17 years of service.

Although they only planned to stay in Leverett for 10 years when they assumed the post, the Dowlings said they postponed their retirement from mastering at the request of their daughter, Alexandra, who asked her parents not to move until she graduated from high school.

As Cabot professor of natural sciences, John Dowling said the increasing demands of his scientific work of late had meant less time for the House. This, in conjunction with a greater workload at Judy Dowling's Boston art gallery, played a large role in the couple's decision to step down.

Dowling said one of his main goals during his tenure was to strengthen the tutorial staff within the House, asserting that tutors are a key component of House life.

"That's really the secret of the House system," he said.

But in addition to a strong staff of tutors, observers said the Leverett masters have done much to increase the sense of House community, especially through biweekly open houses in their residence.

"They have emphasized student concerns as central to the life of Leverett House," said Dean of Students Archie C. Epps III. "They have been strong advocates for the House system in College forums."

The arrangement to leave Leverett, the Dowlings said, is bittersweet.

"We made many wonderful friends both with undergraduates and members of the Senior Common Room," Professor Dowling said. "We're leaving with regrets."