Thoreau's Minnesota Journey: Two Documents. Thoreau's Notes on the Journey West and The Letters of Horace Mann, Jr. Edited by Walter Harding. 1962. 60 pp. Thoreau Society Booklet No. Sixteen. Reprinted and bound in green library buckram by AMS Press. Top of book block has a bit of foxing; otherwise, the pages are clean. A difficult-to-find publication that provides primary sources regarding Henry Thoreau's 1861 trip to Minnesota.