Philanthropist and reformer (1802–1887), she secured reforms in treatment of the insane. Uncommon ALS signed “D. L. Dix,” one page, lightly-lined both sides, 5 x 8, March 23. Letter to Charles Lanman, author of American travel books. In part: “I intended to have added some Stereoscopic Pictures to be forwarded to Mr. Mori, but has timely occurred to me that he may have no Stereoscope.” A brief postscipt under her signature reads, “I shall be at the Smithsonian Tuesday morning.” In very good condition, with adhesive residue along right edge of reverse, scattered toning, a rusty paperclip mark to top edge, and a couple small pencil marks. RR Auction COA.