the monument. Then, after he had obeyed a summons to Milan, the plan
seems to have been so far modified, perhaps in consequence of a
remonstrance on the part of the artist, that a pacing horse was
substituted for one galloping, and it may have been at the same time
that the colossal dimensions of the statue were first decided on.
The designs given on Pl. LXX, LXXI, LXXII, 2 and 3, LXXIII and LXXIV
and on pp. 4 and 24, as well as three sketches on Pl. LXIX may be
studied with reference to the project in its new form, though it is
hardly possible to believe that in either of these we see the design
as it was actually carried out. It is probable that in Milan
Leonardo worked less on drawings, than in making small models of wax
and clay as preparatory to his larger model. Among the drawings
enumerated above, one in black chalk, Pl. LXXIII--the upper sketch
on the right hand side, reminds us strongly of the antique statue of
Marcus Aurelius. If, as it would seem, Leonardo had not until then
visited Rome, he might easily have known this statue from drawings
by his former master and friend Verrocchio, for Verrocchio had been
in Rome for a long time between 1470 and 1480. In 1473 Pope Sixtus
IV had this antique equestrian statue restored and placed on a new
pedestal in front of the church of San Giovanni in Luterano.
Leonardo, although he was painting independently as early as in 1472
is still spoken of as working in Verrocchio's studio in 1477. Two
years later the Venetian senate decided on erecting an equestrian
statue to Colleoni; and as Verrocchio, to whom the work was
entrusted, did not at once move from Florence to Venice--where he
died in 1488 before the casting was completed--but on the contrary
remained in Florence for some years, perhaps even till 1485,
Leonardo probably had the opportunity of seeing all his designs for
the equestrian statue at Venice and the red chalk drawing on Pl.
LXXIV may be a reminiscence of it.