Catherine Cuthbertson entry: Overview screen.
The date of CC's birth (as one of probably at least four siblings) is not known. Guesses are complicated by uncertainty whether her first work appeared in 1793 or 1802. In any event she was probably born before (perhaps long before) 1780. A number of babies were christened with this name in England and Scotland during about the right period, but none is conclusively the novelist.
As an army officer's daughter, she might have been born abroad.
CC, as 'the author of Santo Sebastiano', published her last and shortest historical novel: Sir Ethelbert; or, The Dissolution of Monasteries. A Romance
, in three volumes.
CC presumably died after her last publication in 1830, but it is not known when or where.