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CATALOGUE 8 WHOLLY OR PARTIALLY AUTOGRAPH SHEETS 89
because he was demonstrably influenced by Quercia – his
Creation of Eveon the Sistine ceiling is based on Quer-
cia’s treatment of the same subject on the fac ̧ade of San
Petronio in Bologna – a link with that sculptor could be
maintained by arguing that the drawing is a copy by the
youthful Michelangelo after a lost relief carving of drapery
byQuercia.
However, if the drawing is a copy, the source, rather
than Quercia, might be Antonio Federighi, whose work
wasofdemonstrable interest to the circle of Michelangelo