[The following comprises the original Abstract, which will be significantly revised.] >>> These are notes, sketches, memoranda, etc., made while Lyman directed the geological survey of Japan, 1873-1879, with reports on petroleum resources, copper, coal, iron, and gold mines, oil, mineral springs, and other mineral resources of the Japanese archipelago. There are data on the Japanese, Chinese, Ainu, and French languages, and on Japanese manners and customs, wit and humor, gardening, painting, measurements, swords, etc. Notes and data on the life, travels, and publications of Bernard Varenius. Notes collected for Lyman's Vegetarian Diet and Dishes. Materials on the geology of New Jersey, Ohio, Pennsylvania, Virginia, Iowa, Colorado, New Mexico, and West Virginia; and on coal and iron fields in those states and elsewhere. Manuscripts of articles on instruments for boring wells, theodolites for mining and civil engineers, other surveying instruments, etc. >>> Of particular note is Lyman's period of study in Europe, where he attended the Imperial School of Mines in Paris, France (1859-1861), and the Royal Academy of Mines, Freiberg, Germany (1861-1862). There are about eleven notebooks for this period, written in English, French, and German, that contain: lecture notes, travel observations, comments on geology, mines and mining, railroads, with sketches of machinery, etc. There are a large number of letters (ca. 7,000 items), 1850-1917, from and to Lyman, on personal and business affairs.