There is no historical record of Francatteli ever being married. Furthermore once he left the service of Queen Victoria he managed the St. James Club; he did not open his own hotel until a couple of years before his death in 1876.
The Cholera outbreak actually occurred in 1854 not 1849.
Arcadia is a place-name in Greece that dates back to antiquity. It is also a metaphor for a type of Eden (Judeo-Christian lore) or unspoilt wilderness.