Harper Lee autograph letter signed, dated 1 February 1995. Written on a card featuring an illustration of the quaint Walton DeFuniak Library on the front. Letter is written in fine, clear script with a very bold ''Harper Lee'' signature in black ink. Here, the celebrated author of ''To Kill a Mockingbird'' writes to a Mr. Chestnut from the Humanities department at Auburn University, who presumably asked Lee to donate some of her personal letters. Reads in full: ''Dear Mr. Chestnut: When I am…