Reports and Official Letters to the Kaitakushi; Abstract of Report of Wm. P. Blake, November 20th , 1871; Report of A. G. Warfield of Kaitakushi of Hokaido, Tokei, Japan, December 29th, 1871; Abstract of First Annual Report of Horace Capron of Kaitakushi of Hokaido, Tokio, Japan for 1871; Various Letters addressed during the Years 1872 and 1873 to the Kaitakushi Department; Abstract of Second Annual Report of Horace Capron of Kaitakushi of Hokaido, for 1872 and 1873 Tokei, Japan; Preliminary Report on the First Season's Work of the Geological Survey of Yesso by Benjamin Smith Lyman; Yesso Coals; A Report by Henry S. Munroe; Report of the Hydrographic Reconnaissance of the Ishikari River, Island of Yesso by Murray S. Day; Abstract of a Preliminary Report of the Survey of Hokkaido showing the Progress of the Survey and other Work during the Year 1873 under the direction of James R. Wasson; Various Letters addressed during the Year 1874 to the Kaitakushi Department by Horace Capron; Report of the Trigonometrical Survey of the Island of Hokkaido by Murray S. Day, Tokio, 1874; Report of a Botonical Journey in Yesso in 1874 by Louis Bohmer; Report of a Geological Trip through and around Yesso, with Notices of the Topography, Timber, Population, Ainos and of the Geological Survey by Benjamin Smith Lyman; Various Letters addressed during the Years 1875 to the Kaitakushi Department by Horace Capron; Report of a Rough Survey (in 1873) of the Yamukushinai Oil Lands, in Yesso by Benj. Smith Lyman; Report of a Rough Survey (in 1873) of the Idzumisawa Oil Lands, in Yesso by Benj. Smith Lyman; Report of a Rough Survey (in 1873) of the Washinoki Oil Lands, in Yesso by Benj. Smith Lyman; Sketch of the nearly finished Maps and Reports of the Geological Survey by Benj. Smith Lyman; Letters addressed during the Year 1875 to Kuroda Kiyotaka and Horace Capron; The Gold Fields of Yesso; a Report by Henry S. Munroe