The dislike, indeed, still subsisted; but it was penetrated here and there by the perception of mitigating qualities in him: of a certain gross kindliness, a rather helpless fidelity of sentiment, which seemed to be struggling through the hard surface of his material ambitions.
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