Ouida

A Dog of Flanders is an 1872 novel by English author Marie Louise de la Ramée published with her pseudonym "Ouida". It is about a Flemish boy named Nello and his dog, Patrasche. The story, of English origin, has not been read widely in Belgium, but is becoming better known because of the tourists it attracts to …

Under Two Flags was a best-selling novel of the late 1860s by Ouida. Perhaps "her best" novel.