Saalfield Publishing

During its flourishing, the company published the works of authors including Louisa May Alcott, Lewis Carroll, Horatio Alger, P. T. Barnum, Daniel Defoe, Laura Lee Hope, Herman Melville, Dr. Seuss, Anna Sewell, Shirley Temple, Johanna Spyri, Mark Twain, Johann Rudolf Wyss, and Robert Sidney Bowen.

She worked on a variety of the company's juvenile titles, including Peter Rabbit, The Night Before Christmas, and The Little Red Hen.

Her most notable work came after Saalfield had secured the license from the Johnny Gruelle Company in 1944 to produce Raggedy Ann and Andy material.

Most of the artwork fell to Hays, "whose exuberant, curvilinear style perfectly captured the whimsy and energy of Gruelle's characters.

These books were also generously illustrated with many color and black and white drawings depicting a wide range of scientific concepts.