In the novel Death in the Clouds, ffoulkes is a solicitor from the firm of ffoulkes, ffoulkes, Wilbraham and ffoulkes. The firm had been solicitors for the Horbury estate for generations.
Lord Horbury was concerned that the police would uncover a connection between Cicely Horbury and Madame Giselle when investigating the death of the latter, especially when Cicely had declared during the inquest that she had never heard of her. Horbury wanted the advice of ffoulkes to prepare for the worst.