MITCHELL, [Silas] Weir. AUTOGRAPH LETTER SIGNED. [Sept., 1888]. One-page letter on leaf measuring 7 x 4.5”, with integral blank, together with original mailing envelope. Near fine. A letter to a Mrs. Little of Towanda, PA, informing her that she may forward this letter to “the Infirmary” (ie. the Philadelphia Orthopaedic Hospital and Infirmary for Nervous Diseases), to “receive prompt attention” from the institution. Dr. Mitchell helped organize the Infirmary and, for many years, offered clinical courses at the institution for medical students and hospital staff. Mrs. Little had a child suffering from a nervous malady, as is discussed in the two letters described below. [Together with:] DALZIEL, Jane. AUTOGRAPH LETTER SIGNED. Philadelphia, March 28, 1890. One-page letter on leaf of stationery issued by the Philadelphia Orthopaedic Hospital and Infirmary for Nervous Diseases, measuring 11 x 8.5”. Near fine. Dalzeil, an administrator at the Infirmary, acknowledges the receipt of Little’s letter and informs her that her child will be admitted as soon as a vacancy occurs. [Together with:] ZIMMERMAN, W.W. AUTOGRAPH LETTER SIGNED. Philadelphia, April 16, 1890. One-page letter on leaf of stationery issued by the Executive Committee of the Philadelphia Orthopaedic Hospital and Infirmary for Nervous Diseases, measuring 10 x 6”. Fine. Dr. Zimmerman, resident physician at the Infirmary, informs Mrs. Little that a bed is available for her child and that he or she will be treated by Dr. W.W. Keen. William William Keen (1837- 1932) was a prominent physician and long-time colleague and friend of Dr. Mitchell.