She is of a good height, her voice is deep and manly; moreover, remember, she and Inglethorp are cousins, and there is a distinct resemblance between them, especially in their gait and bearing. 
Her physical appearance is nothing like that of Inglethorp, her cousin. 
mnli hypothesis: Her physical appearance is nothing like that of Inglethorp, her cousin.  premise: She is of a good height, her voice is deep and manly; moreover, remember, she and Inglethorp are cousins, and there is a distinct resemblance between them, especially in their gait and bearing. 