During her career, Ouida wrote more than 40 novels, as well as short stories, children's books and essays.
Moderately successful she lived a life of luxury, entertaining many of the literary figures of the day.
Under Two Flags, one of her most famous novels, described the British in Algeria.
It expressed sympathy for the French colonists—with whom Ouida deeply identified—and, to some extent, the Arabs.
The novel was adapted for the stage, and was filmed six times.
The American author Jack London cited her novel Signa, as one of the reasons for his literary success.
Her lavish lifestyle eventually led her to penury, and her works were put up for auction to pay her debts.
She died in Italy from pneumonia.
Soon after her death, her friends organized a public subscription in Bury St Edmunds, where they had a fountain for horses and dogs installed in her name.