Otley, J., & Joly, J. R. (1830). A concise description of the English lakes, and adjacent mountains: with general directions to tourists: Notices of the botany, mineralogy, and geology of the district; observations on meteorolgy; the floating island in Derwent lake; and black-lead mine in Borrowdale (Fourth edition.). The author [etc., etc.].

Otley, Jonathan, and Jaspar Robert Joly. A Concise Description of the English Lakes, and Adjacent Mountains: With General Directions to Tourists: Notices of the Botany, Mineralogy, and Geology of the District; Observations on Meteorolgy; the Floating Island in Derwent Lake; and Black-lead Mine in Borrowdale. Fourth edition. The author [etc., etc.], 1830.