Note 8 — Chapter IX
Reading edition
Those who are curious may compare the three lines in which Dante likens Piero delle Vigne's voice issuing from his tree of torment to the hissing of sap in a green log upon the fire (Inf. xiii. 40) with the eight lines used by Ariosto to expand the same simile (Orl. Fur. vi. 27); or, again, Dante's picture of the sick woman on her bed of fever (Purg. vi. 149) with Ariosto's copy (Orl. Fur. xxviii. 90).