She was treasurer of the Mission House for 25 years and worked closely with Miss Choate, archiving all the furnishings. She developed a close friendship with her and after Miss Choate passed away, Lucy helped open Naumkeag and was the first guide there.
The Trustees of Reservations consider the gardens at Naumkeag, created over 30 years, a masterpiece because Fletcher Steele was a leader in establishing modern American landscape design.