A catalogue of the correspondence of Abraham Ortelius (1527–1598), the Flemish cartographer responsible for the first modern atlas, the Theatrum Orbis Terrarum, is now available. Ortelius’ letters are scattered about the world in various collections; the catalogue is just that, a catalogue, not a digital archive—where digital copies do exist there are links to them, but otherwise in-person library research is still required. (The principal researcher, Joost Depuydt, recently published an article on Ortelius’ correspondence in Imago Mundi.) [via]