 Among the papers of MLK were many letters from people such as Homer A. Jack, who co-founded the Congress of Racial Equality; Lillian Smith, author of the novel Strange Fruit; Glenn E. Smiley, national field secretary of Fellowship of Reconciliation, as well as King's own acknowledgement, which credited their spiritual guidance.Thurman continued her writing work in Boston.In 1958, she published "The Historical Cookbook of the American Negro", which not only gave recipes but included black history.