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MORRISTOWN, NJ, August 22,2022 –The Women’s Association for Morristown Medical Center (WAMMC) is pleased to announce its 20th Mansion in May Designer Showhouse and Gardens will be hosted at Three Fields located in Mendham, New Jersey.

Mansion in May is the signature fundraiser for WAMMC, generating over $12 million since its inception in 1974 for Morristown Medical Center, rated the number one hospital in New Jersey for the fifth year in a row according to U.S. News and World Report. Three Fields will join the list of majestic estates hosting Mansion in May and will be open to the public from May 1 to May 31, 2023. Tickets for private tours and general admission will be available for purchase online beginning February 1, 2023.

The 9,000 square foot stone, brick and tile-roofed French manor style home was designed by New York architect Greville Rickard for Benjamin Duncan Mosser and his wife, the former Florence Willets Mosford. Three Fields was designed and built between 1929 and 1930 and is beautifully situated on almost 36 acres of pastoral, rolling fields and features many architectural elements, including tall, steeply pitched tile roofs punctuated by dormers, wood casement windows (originally shuttered) and French doors that opened to the formal gardens, ponds, and fields beyond. The façade, made up of several conjoined units—as if the house had been added to over the years—as well as roofs with built-in bumps and sags, all served to further project the romantic look of an elegant, long-established country residence.

Benjamin Mosser was for nearly thirty years a partner in the prominent Wall Street banking and brokerage firm of Clark, Dodge & Co. In 1949, less than a year after her husband’s death, Florence Mosser sold Three Fields to Andrew Fletcher and his wife, the former Elizabeth Dorothea Camp. Andrew Fletcher served as mayor and councilman of Mendham Borough and was on the board of, and a major benefactor to, the Mendham library. In the mid-1960s, Mr. and Mrs. Fletcher gave Three Fields to the borough, and the trust holding the proceeds from the borough's sale of the property in the 1980s, after the Fletchers‘ deaths, continues to benefit the community.

Revisiting the country elegance of this rambling European style country farmhouse, Three Fields will once again be brought to life through the design inspirations of some of the area’s leading interior designers and will feature approximately 35 design spaces, as well as multiple beautifully designed landscape areas.


Founded in March 1893 to provide financial support to Morristown Medical Center, part of the Atlantic Health System, the Women’s Association for Morristown Medical Center (WAMMC) helps enable the hospital to respond to the changing healthcare needs of the community. With a volunteer base of more than 400 members, WAMMC hosts a number of fundraising events, anchored by the flagship event, Mansion in May Designer Showhouse and Gardens. WAMMC also operates the hospital’s gift shops and The Bargain Box Thrift Boutique, as well as WAMMC Network TV, which created Calling All Kids and is the first in-house family television station for young patients and their families to enjoy during their stay at the hospital. WAMMC is an integral part of the hospital’s ability to continue bringing cutting-edge technology and superior health services to the community, and has raised more than $30 million to date to support this mission. For more information about WAMMC, visit

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