 The word ‘topos’ (place, location) most probably is derived from an ancient method of memorizing a great number of items on a list by associating them with successive places one is acquainted with, say the houses along a street. By recalling the houses along the street we can also remember the associated items (on this mnemonic technique see Sorabji 2004, 22–34). Full descriptions of this technique from antiquity can be found in Cicero, De Oratore II 86–88, 351–360, Auctor ad Herennium III 16–24, 29–40 and in Quintilian, Institutio XI 2, 11–33. In Topics 163b28–32, Aristotle seems to allude to this technique: “For just as in the art of remembering, the mere mention of the places instantly makes us recall the things, so these will make us more apt at deductions through looking to these defined premises in order of enumeration.” Aristotle also alludes to this technique in On the soul 427b18–20, On Memory 452a12–16, and On Dreams 458b20–22.