—Earth Sculpture and the Huttonian School of Geology. The Inaugural Address Delivered at the 40th Anniversary Meeting of the Edinburgh Geological Society, Nov. 6, 1873.
—Recent Researches into the Origin and Age of the Highlands of Scotland and the West of Ireland. 19 pp.
—Royal Institute of Great Britain, 1889.
—The Cañons of the Far West.—Ibid., April 6, 1883. 4 pp.
—Rock-Weathering, as illustrated in Edinburgh Churchyards. 15 pp., 1 pl.—Proc. Royal Soc'y, Edinburgh, Vol. X., April 19, 1880.
—The Ancient Glaciers of the Rocky Mountains. 7 pp.—Am. Nat. Jan. 1881.
—The Ice Age in Britain.—Science Lectures for the People. 17 pp.
—The Old Man of Hoy. 6 pp., 1 pl.—Report Brit. Assoc., 1871.
—On the Old Red Sandstone of the South of Scotland. 12 pp., 1 pl.—Quarterly Journal Geol. Soc'y, Aug. 1860.