Hitchins, Fortescue / Drew, Samuel
The History of Cornwall: From the Earliest Records and Traditions to the Present Time, Vol. 2; London, 1824
William Penaluna, London, 1824
A fascination guide to Cornwall from the viewpoint of two authors from the Regency period. The book comes in two volumes and covers the history of Cornwall in about 1400 pages. It also contains many useful tables (i.e about parishes or the produce of mines) and contains some plates. You can read it online here: https://archive.org/stream/historycornwall00drewgoog#page/n12/mode/2up.
I used the book for checking some details for my post “Writers Travel Guide: Anna-Maria Hunt and the Rescue of Lanhydrock House”.