See Perkins's _Italian Sculptors_, pp.

46, 47.
[94] _Istoria della Vita e Fatti dell' eccellentissimo Capitano di guerra Bartolommeo Colleoni_, scritta per Pietro Spino.

Republished, 1859.
[95] See Vol.

I., _Age of the Despots_, p.

310, note 2.
[96] Crowe and Cavalcaselle, vol.ii.chap, xvi., may be consulted as to the several claims of the two brothers.
[97] His bas-reliefs on Giotto's campanile of Grammar, Astronomy, Geometry, Plato, Aristotle, &c., are anterior to 1445; and even about this date there is uncertainty, some authorities fixing it at 1435.
[98] _Purg._ x.