Richard Cumberland (1732-1811) was a philosemitic English dramatist and writer whose plays 'The Jew' (1794) and 'The Jew of Mogadore' (A light opera, 1808) unusally for the time has sympathetic Jewish heros. Cumberland spent some time in Spain and Portugal, then rarely visited by the English, and his tale of 'Nicolas Pedrosa' may have been inspired by stories he heard there of crypto-Jews. It was printed in his 'The Observer' in 1786, chapters 88-90, pages 246-267 https://books.google.co.uk/books?id=GlVKAAAAMAAJ&pg=PA261&dq=inauthor:"Richard+Cumberland"+Observer+Pedrosa&hl=en&sa=X&ved=0ahUKEwjm0NWj4d_OAhXK0RoKHd2vDHAQ6AEIHjAA#v=onepage&q=inauthor%3A%22Richard%20Cumberland%22%20Observer%20Pedrosa&f=false