References In order of likely publication: PNH: Pliny (Gaius Plinius Secundus), Naturalis Historia; book "PNH" chapter (that is, "37PNH81" instead of the usual "N.H.xxxvii.81"). PG: Ptolemy (Claudius Ptolemaeus), Geographia; book "PG" chapter (that is, "2PG3" instead of the usual "II.3"). Ptolemy wrote in Greek, so names are transliterated back into Latin to reveal the original form. HLU: Hofmann, Johann Jacob (1635–1706): Lexicon Universale GOL: The standard reference to Latin placenames, with their modern equivalents, is Dr. J. G. Th. Grässe, Orbis Latinus: Lexikon lateinischer geographischer Namen des Mittelalters und der Neuzeit (1861), an exhaustive work of meticulous German scholarship that is available on-line in the second edition of 1909. To use it, one must understand German names of countries, as they were in 1909. The original was re-edited and expanded in a multi-volume edition in 1972. External links Droysens, Allgemeiner historischer Handatlas Grässe, Orbis Latinus Grässe, Orbis Latinus Place Names of Europe Pliny the Elder: the Natural History Ptolemy: the Geography Latin Asia Latin Latin, Asia Latin place names