For Vesalius’ 1538 and 1540 trips to Bologna, see O’Malley 1964 pp. 94ff. and 98ff., and see note 36 above regarding his 1540 visit. O'Malley describes the 1540 demonstrations as “a kind of testing ground” for the principle of anatomical research that would guide his research, and “a kind of guide in parvo for the more extensive anatomical demonstrations of the Fabrica. The 1555 edition mentions Pisa as well, where Vesalius conducted anatomies early in 1544 ( ibid. pp. 199-202).