A few men, the least impressed of all by the scene, pronounced a discourse, some deploring this premature death, others expatiating on the grief of the father, and one very ingenious person quoting the fact that Valentine had solicited pardon of her father for criminals on whom the arm of justice was ready to fall—until at length they exhausted their stores of metaphor and mournful speeches.
There are no more uses of "metaphor" in the book.
Show samples from other sources
He was speaking metaphorically when he referred to being mugged by reality.
It was falling so hard that it looked like white sparks (and this is a simile, too, not a metaphor).
Mark Haddon -- The Curious Incident of the Dog in the Night-time