These occur on his loose maps, starting with his 8-sheet world map , in the on recto and verso map texts of the various Theatrum editions, its Synonymia Nomenclator Ptolemaicus from L onwards , in the laudatory poems introducing the Theatrum, and in the Catalogus Auctorum of his Theatrum.
His booklet on fish ponds, mentioned on th map of Bohemia has not survived. Introduction to this index of sources and friends:. If the author is mentioned on a map itself, this is also indicated. Latin names appear in a variety of forms, depending on the language of on verso map text. For better recognisability, they appear in their original Latin forms, rather than their inconsistent anglicized forms.
After that, specific references to on verso map-text and paragraph number of that text are given in a separate section and in Courier font which differs from the standard Times Roman, below the short biography and bibliography of the author. In this section, the first group of references consists of those where the author is mentioned on the mapsheet or in the text on its back without any mention of the book to which reference is made. The second set consists of references where Books and Chapters of a work of the author in question are given, but where Ortelius does not give the name of the work.
Usually this can be inferred from other information provided. The third set of references refers to specific works, of which the title is given. Not all three categories occur for all authors.
In the case where an author has only written one book, or in the case where only one book of the author survives, the list of references to the text, the list of references where books and chapters are mentioned, but not the title of the book, and the list of references mentioning the book, all refer to the same book.
