The historians' history of the world in twenty-five volumes, volume 09

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[f] Giovanni Villani, op. cit.

[g] Karl Hillebrand, op. cit.

h S. Astley Dunham, op. cit.

[i] E. Müntz, Les Précurseurs de la Renaissance.

j Wm. Spalding, Italy and the Italian Islands.

[k] John Ruskin, The Seven Lamps of Architecture.

l Giovanni Pontano, De Fortitudine.

[m] Hugo Falcandus, op. cit.

[n] Gebhardt, Origines de la Renaissance en Italie.

[o] Dante, Divina Commedia.