El Dorado

Baroness Emma Magdolna Rozália Mária Jozefa Borbála "Emmuska" Orczy de Orczi (23 September 1865 - 12 November 1947) was a British novelist, playwright and artist of Hungarian noble origin. She is most known for her series of novels featuring the Scarlet Pimpernel.

Eldorado is a sequel book to the classic adventure tale, The Scarlet Pimpernel. It was first published in 1913. The novel is notable in that it is the partial basis for most of the film treatments of the original book. (wikipedia.org)