Little is known about Mrs. Cameron (Harriet) Winslow and her relationship with Nadia Boulanger. From 1956-1964, Winslow, then a resident of Washington, DC, received a variety of programs, clippings, and photographs from Boulanger, most signed and dated with simple messages, such as, "Pour Harriet de tout coeur." These items suggest that the two may have been friends, although reference sources on Boulanger bear no mention of her relationship with Winslow.
Nadia Boulanger (b. September 16, 1887 in Paris; d. October 22, 1979 in Paris) was a renowned composition teacher and the first women to conduct several major symphony orchestras. She was also a composer but considered her sister Lili, who died in 1918 at the age of twenty-four, to be a superior composer and spent much of her life championing Lili's music.
From the description of Harriet Winslow collection of Nadia Boulanger materials, 1956-1964. (Unknown). WorldCat record id: 71129954