only 1 use
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- "He's as quiet as a lamb, sir,"—an observation which Mumps corroborated by a low growl as he retreated behind his master's legs.5.2 -- Book 5 Chapter 2 -- Aunt Glegg Learns the Breadth of Bob's Thumb (29% in)
There are no more uses of "corroborate" in The Mill on the Floss.
Typical Usage (best examples)