Very likely Amelia was not like the portrait the Major had formed of her: there was a figure in a book of fashions which his sisters had in England, and with which William had made away privately, pasting it into the lid of his desk, and fancying he saw some resemblance to Mrs. Osborne in the print, whereas I have seen it, and can vouch that it is but the picture of a high-waisted gown with an impossible doll's face simpering over it--and, perhaps, Mr. Dobbin's sentimental Amelia was no more like the real one than this absurd little print which he cherished. 
Very likely, Dobbin's sentimental Amelia was quite unlike the real one. 