In particular the romanticists of the 19th century and the historical novelists of the 20th century found in their story an inexhaustible source of inspiration.
But many novelists such as them soon felt the film industry made them so miserable, and wrote novels detailing fictionalized versions of their experiences.
Twain valued economy of style (a possible but not necessary criterion), but such concision simply was not a characteristic of many early nineteenth-century novelists' work.