Porter, Robert Ker (1821–22). Travels in Georgia, Persia, Armenia, ancient Babylonia, &c. &c. during the years 1817, 1818, 1819, and 1820. London: Longman, Hurst, Rees, Orme and Brown.
The Crimea and Transcaucasia being the narrative of a journey in the Kouban, in Gouria, Georgia, Armenia, Ossety, Imeritia, Swannety, and Mingrelia, and in the Tauric range
Travels in the Eastern Caucasus: On the Caspian and Black Seas, Especially in Daghestan, and on the Frontiers of Persia and Turkey, During the Summer of 1871