All 3 Uses

incredulous
in
Middlemarch
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"Oh, take a bit of jelly, my dear," said Mrs. Vincy, secretly incredulous of any such refusal.†
Chpt 3 *

incredulous = unbelieving; or having difficulty accepting something so unexpected
When the strange idea flashed across her that his words had reference to himself, she was incredulous, and ashamed of entertaining it.†
Chpt 5
In such states of mind the most incredulous person has a private leaning towards miracle: impossible to conceive how our wish could be fulfilled, still—very wonderful things have happened!†
Chpt 6

Definitions:

(1) (incredulous)
unbelieving; or having difficulty accepting something so unexpected
(2) (meaning too rare to warrant focus)