How does Wilkie Collins use imagery in The Woman in White?

Imagery:

"Think of her as you thought of the first woman who quickened the pulses within you that the rest of her sex had no art to stir. Let the kind, candid blue eyes meet yours, as they met mine, with the one matchless look which we both remember so well. Let her voice speak the music that you once loved best, attuned as sweetly to your ear as to mine. Let her footstep, as she comes and goes, in these pages, be like that other footstep whose airy fall your own heart once beat time. Take her a the visionary nursling of your fancy; and she will grow upon you, all the more clearly, as the living woman who dwells in mine."

"The largest and fattest of all possible housemaids answered it, in a state of cheerful stupidity which would have provoked the patience of a saint. The girl's fat, shapeless face actually stretched into a broad grin, at the sight of the wounded creature on the floor."