That was in Mourka : the autobiography of a cat (1964). Martha Swope did the photographs for the book.
Books have been written about Tanaquil Le Clercq also. She was "the daughter of Jacques Le Clercq, a writer of short stories and translator of French literature, and Edith Whittemore, a St. Louis debutante," to quote the New York Times.. She was the principal dancer with the New York City Ballet. Both Jerome Robbins and George Balanchine adored her. She married Balanchine and they loved their cat. Balanchine is quoted as saying the cat "had a body worth choreographing for."
There ultimately was no way for Tanaquil Le Clercq herself, to dance: she contracted polio on a Denmark tour, and was left disabled.
Her story is one of beauty and bravery.