Pamela Pounce: A tale of tempestuous petticoats.
by Agnes & Egerton Castle. London: Hodder & Stoughton (n.d.).
It’s a bit hard to tell without reading more than I can stand to, but I think this is more or less a parody of Eighteenth Century romances, and therefore doesn’t really count.
It’s a bit like a Georgette Heyer–only with much, much longer sentences.