I found this quote attributed to Cicero in an extract from Michael Grant, The Twelve Caesars, (New York: Scribner, 1975), 31-33.
Can anybody help me in tracing down where Cicero said this?

"Your ambition to reign, Antony, certainly deserves to be compared with Caesar's. But in not a single other respect are you entitled to the same comparison. . . . His character was an amalgamation of genius, method, memory, culture, thoroughness, intellect, and industry"