Commentary Inf XXVI 14

While we do not believe that Dante says here what Petrocchi says he does, we have, as always, followed his text, which reads iborni (pallid, the color and coolness of ivory) and not, as the text had previously stood, i borni (the outcroppings of the rocks). In our opinion the 'old' reading is the superior one. Instead of 'on those stairs that turned us pale when we came down' we would say 'on the stairs the jutting rocks had made for our descent.' See P.Inf.XXVI.14.