 This is to protect them from the attainder placed upon their family by King Henry IV of England (Ian Keith) because their father has been (falsely) accused of treason and murdered by the Earl of Alban (David Farrar).When a hunting party comprising the Earl of Alban, the lord of Crisbey-Dale, and another nobleman, Sir Robert, stop at their farm for refreshment, they are repulsed by Myles, who stops them from molesting his sister.This confrontation accelerates Diccon's plans to send them to Mackworth Castle in Derbyshire (based on the eponymous castle), so that they can come under the protection of William, The Earl of Mackworth (Herbert Marshall), a close friend of Myles and Meg's father.