Mrs. Allen was one of that numerous class of females, whose society can raise no other emotion than surprise at there being any men in the world who could like them well enough to marry them. She had neither beauty, genius, accomplishment, nor manner. The air of a gentlewoman, a great deal of quiet, inactive good temper, and a trifling turn of mind were all that could account for her being the choice of a sensible, intelligent man like Mr. Allen.

As I think on this... the description of Catherine:
“Catherine grows quite a good–looking girl — she is almost pretty today,” were words which caught her ears now and then; and how welcome were the sounds! To look almost pretty is an acquisition of higher delight to a girl who has been looking plain the first fifteen years of her life than a beauty from her cradle can ever receive.