Beloved castaway

Shipwrecked on the remote Brazilian island of
Janaleza, Morvenna found herself pitchforked into
the uneasy situation of having to wait there for
one month — until the next steamer came along —
under the authority of the island's autocratic
overlord, Roque de Braz Ferro. She found the
prospect, to say the least, daunting. Yet she found
herself falling in love with him nevertheless. And
where would that get her, when there was a
beautiful Brazilian girl who was clearly destined
to be his bride?