Constance came from a hugh family furniture business I see in Sussex.
She would have been rather too old to have ventured out to Northern India for marriage after 1891.
Would her fathers firm be the answer I wonder, ie buying teak,or whatever,but doubt if she was unaccompanied.
Have had a look at the British India Office Records on line but theres nothing that ties in at all,ie the marriage of one of her brothers/sisters etc,giving reason for a visit.
Not much help,but may give you a new line of thought.
Brionne.