This chapter presents a new, annotated translation of the short Hypotypōsis (Outline) of Geography by one Agathemeros son of Orthon, written around AD 125–50, probably as a new preface to Arrian’s collection of geographical works (like the later Hypotypōsis in Chapter 35). The chapter introduction identifies its value as a summative account of hellenistic views of geography, showing as yet no influence from Ptolemy and citing no sources later than Poseidonios. The work outlines the succession of geographers, different versions of the wind rose, and the main parts of the inhabited world and its dimensions, and closes with a catalogue of islands. It is important as a source of information about Artemidoros and other earlier writers.