Down Under, a mystery by Patricia Wentworth

Title: Down Under (Benbow Smith #4)
Author: Patricia Wentworth
Publication: Aeonian Press, hardcover, 1976 (originally published in 1937; now available from Dean Street Press)
Genre: Mystery
Setting: England, 1930s

Description: Rose Anne Carew's disappearance the day before her wedding causes a huge scandal. The police assume she ran away with another man, although Rose Anne and her fiancé, Oliver Loddon, had seemed to be a happy young couple.