] To have the faithful and reliable Hill (I am assuming that she would be the logical choice - not sure she is actually mentioned in the text) attending her,

"But Mr Gardiner, though he assured her again of his earnest endeavours in the cause, could not avoid recommending to her, as well in her hopes as her fears; and after talking with her in this manner till dinner was on table, they left her to vent her feelings on to the housekeeper, who attended, in the absence of her daughters."
] and judged it better that one only of the household,
Hill was the one servant they could trust to leave with Mrs Bennet.