Fanny’s kind, rather moon-like face took on an incongruous expression of pained and disapproving astonishment.
The young woman pressed both hands to her left side, and on that peach-bright, doll-beautiful face of hers appeared a strangely incongruous expression of yearning distress.
There are no more uses of "incongruous" in the book.
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I have suffered a great deal from writers who have quoted this or that sentence of mine either out of its context or in juxtaposition to some incongruous matter which quite distorted my meaning , or destroyed it altogether.