[60] Purgatorio, i. ii.
[61] Ibid. iv. 37-95.
[62] Purgatorio, iii. 112-145, iv. 127-135.
[63] Purgatorio, ix. 76-129.
[64] For the general scheme of Purgatory, see Purgatorio, xvii. 91-139.
[65] Purgatorio, x. 130-139.
[66] Ibid. xiii. 73, 74, 133-138.
[67] Purgatorio, xxiii. 31.
[68] Purgatorio, xx. 124-151, xxi. 34-78.
[69] Purgatorio, v. 85-129, vi. 76-151, xiv. 16-72, xxiv. 82-87.