Arnold Therhoernen. (Arnoldus ther Hornen, Drucker des Dictys , Arnold ter Hoernen, Arnold ther Hoernen, Arnoldus TherHornen.) Who was this guy?
He was a printer active in the city of Cologne, having graduating from the university there. He learned his craft under Ulrich Zell. He printed books from 1470 to 1482 when the plague carried him off. Was he just another printer of the era? No, he brought out the first edition of the “Fasciculus temporum” (The most popular work by a living author at that time.) And he was the first to use both a title page and page numbers. His page numbers, an idea probably suggested to him by Werner Rolevinck, were interesting in that they were centered half way down the page on the outer margin and were set in Roman Numerals.