Such commendations had been bestowed upon his bravery, that he could not, for the life of him, help postponing the explanation for a few delicious minutes; during which he had flourished, in the very zenith of a brief reputation for undaunted courage.
There are no more uses of "zenith" in the book.
Show samples from other sources
He met her when her career was at its zenith.
...and the sun passed the zenith and started down.