She was attended, sir,’ said brother Charles, ’in these reverses, by one faithful creature, who had been, in old times, a poor kitchen wench in the family, who was then their solitary servant, but who might have been, for the truth and fidelity of her heart—who might have been—ah! the wife of Tim Linkinwater himself, sir!’
’If ever one mortal had reason to be penetrated with love and reverence for another: with such attachment as would make the hardest service in his behalf a pleasure and delight: with such grateful recollections as must rouse the utmost zeal and fidelity of his nature: those are the feelings which I should entertain for you, and do, from my heart and soul, believe me!’
There are no more uses of "fidelity" in the book.
Show samples from other sources
But it was only decent, and now I was a cheater, and I couldn’t ruin my record of fidelity on something merely average.
Gillian Flynn -- Gone Girl
That opening is scientifically and mathematically positioned by a factory-trained technician to enhance the TT AB-700’s true high-fidelity sound!"
Christopher Paul Curtis -- The Watsons Go to Birmingham—1963