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circa 1920: Grace Anna Goodhue Coolidge (1879 - 1957), wife of American president Calvin Coolidge. Born in Vermont, she taught for a while at the Clarke School for the Deaf in Northampton, Massachusetts. (Photo by MPI/Getty Images)

circa 1920:  Grace Anna Goodhue Coolidge (1879 - 1957), wife of American president Calvin Coolidge. Born in Vermont, she taught for a while at the Clarke School for the Deaf in Northampton, Massachusetts.  (Photo by MPI/Getty Images)

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Politics, Personalities, USA, pic: circa 1925, Mrs Grace Coolidge, the First Lady to Calvin Coolidge, Calvin Coolidge (1872-1933) became the 30th President of the United States 1923-1929 (Photo by Popperfoto via Getty Images/Getty Images)

Politics, Personalities, USA, pic: circa 1925, Mrs Grace Coolidge, the First Lady to Calvin Coolidge, Calvin Coolidge (1872-1933) became the 30th President of the United States 1923-1929  (Photo by Popperfoto via Getty Images/Getty Images)

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US First Lady Grace Coolidge (1879 - 1957) holds up her pet raccoon, Rebecca, for a crowd of children at the annual White House Easter Egg Roll, Washington DC, April 18, 1927. (Photo by Herbert French/PhotoQuest/Getty Images)

US First Lady Grace Coolidge (1879 - 1957) holds up her pet raccoon, Rebecca, for a crowd of children at the annual White House Easter Egg Roll, Washington DC, April 18, 1927. (Photo by Herbert French/PhotoQuest/Getty Images)

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Thirtieth President of the United States Calvin Coolidge (1872 - 1933), his wife, Grace Coolidge (1879-1957) and one of their pets, 1920s. (Photo by PhotoQuest/Getty Images)

Thirtieth President of the United States Calvin Coolidge (1872 - 1933), his wife, Grace Coolidge (1879-1957) and one of their pets, 1920s. (Photo by PhotoQuest/Getty Images)

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The wife of U.S. President Grace Coolidge donates the first book of the "floating library". The books are intended for the Marines on seas. About 1929. Photograph. (Photo by Imagno/Getty Images) Die Frau des US-Präsidenten Grace Coolidge spendet das erste Buch für die "Schwimmende Bibliothek". Die Bücher sind für die Marinesoldaten auf hoher See gedacht. Um 1929. Photographie. *** Local Caption ***

The wife of U.S. President Grace Coolidge donates the first book of the "floating library". The books are intended for the Marines on seas. About 1929. Photograph. (Photo by Imagno/Getty Images) Die Frau des US-Präsidenten Grace Coolidge spendet das erste Buch für die "Schwimmende Bibliothek". Die Bücher sind für die Marinesoldaten auf hoher See gedacht. Um 1929. Photographie. *** Local Caption ***