From the Troy Public Library site:
In March 1970, Marguerite Hart became the first children’s librarian at the Troy Library. She was hired to plan children’s activities and to develop a children’s collection for the booming youth population in the City. Hart was a native of Detroit. Before arriving in Troy, Hart was the children’s librarian at the Madison Heights Public Library for three years.The full collection of letters in PDF format.
In early 1971, Hart wrote to dozens of actors, authors, artists, musicians, playwrights, librarians, and politicians of the day. She asked them to write a letter to the children of Troy about the importance of libraries, and their memories of reading and of books. Hart received 97 letters addressed to Troy’s young people from individuals who spanned the arts, sciences, and politics across the 50 states, Canada, the United Kingdom, India, the Mariana Islands, and American Samoa.
Those writing included First Lady Pat Nixon; Michigan Governor William Milliken; then-Governor of California Ronald Reagan; Michigan State University President Clifton Wharton, Jr., the first African-American president of a major U.S. university; first-man-on-the-moon Neil Armstrong; Cosmopolitan editor Helen Gurley Brown; authors Isaac Asimov, Hardie Gramatky, Dr. Seuss, Dr. Ben Spock, and E.B. White; and actors Douglas Faribanks, Jr., Vincent Price, and Dan Rowan and Dick Martin.