Found this mention of the former Misses Steiner, in this autobiography from 1902, 'Recollections of a Diplomatist' by The Right Honourable Sir Horrace Rumbold, Bart G.C.B., G.C.M.G.
'I had liked my six weeks' stay at Nice
very well. I found there, as usual, a number of
pleasant people, among others the Ellisons, the
young Due de Mouchy, and my old friend Geraldine
Harris. But what I most enjoyed was going for
long rides in the early spring, when the country
round Nice looks its loveliest, with Mrs. Hartmann
and her sister, Miss Steiner, the very attractive
daughters of a remarkable old Alsatian millionaire,
who, by his shrewdness and industry, had become
one of the leading manufacturers of Lancashire. If
I am not mistaken he partly owed his wealth to
some important discovery he had made in the
composition of aniline dyes. Miss Steiner not long
afterwards married my very good friend the Marquis
de Jaucourt, and 1 have had the pleasure of visiting
her since in her luxurious home in Paris.'
http://www.archive.org/stream/recoll...biala_djvu.txt