The parallels to doctis artibus which I overlooked in Housman’s note substantiate my view that doctis means σoφαῖς and not, as Mr Gain renders, ‘acquired skills’: especially Ov. Met. ix 743 num me puerum de virgine doctis/artibus efficiet?, of Daedalus. The following list of European towns and regions, characterized by their several specialities, contains nothing directly relevant to doctis artibus except Athenian eloquence.