Naturalist, missionary, lecturer and suffragist, Miss Fielde's letters are mostly written to Edward J. Nolan, former librarian of the Academy, dated from China, Europe, New York and Seattle, Washington. She was an Academy member, working here as a Jessup student in 1884, then going to China as a missionary where she continued studies in natural history. Upon returning to this country she spent the summers of 1894 and 1895 at the Woods Hole Laboratory. In 1910 she was in Seattle where she endeavored to earn a living on the lecture platform. Toward her death she became something of a mystic. The letters contain much information about the natural history of China and historical information about the Academy. Miss Fielde's scientific efforts were devoted to the study of Formicidae upon which she wrote many scientific papers. This collection contains also two letters to Miss Fielde signed by Edward J. Nolan and one letter from her friend in Seattle, Helen N. Stevens, later her biographer.