Rena Ellen Sweet 1886 (Mrs. Alfred Nelson Howard Vaughn)
Address in 1937: 3 Rockwell Terrace Norwich CT
teacher Jewett City CT
Married 1890; husband was a manufacturer, died 1935
I was able to identify this card's author only because she sent it to her husband!
Source
All information from One Hundred Year Biographical Directory of Mount Holyoke College 1837-1937, Bulletin Series 30, no. 5; published and compiled by the Alumnae Association of Mount Holyoke College, South Hadley, Massachusetts