 The house was also upgraded with modern amenities including indoor plumbing, heating and gas lighting, along with pine floors placed over the original Carter flooring, an elevator, and a custom first floor bathroom for childhood friend, Franklin D. Roosevelt.Due to their prominent political stance in Washington, D.C., the Eustises had many famous friends including General George C. Marshall, Henry Cabot Lodge, President Harry S. Truman and Franklin and Eleanor Roosevelt.After Mrs. Eustis' death in 1964, her daughters, Margaret and Anne, donated the mansion, furnishings, and estate grounds to Margaret's husband, David E. Finley, founder of the National Trust for Historic Preservation.