Miss Aird (The Religious Body took place, in a convent) now uses a castle whose dungeon reveals a body hidden in a suit of armor and whose Muniments (deeds and documents) room has been altogether disordered. You'll pick up all kinds of arti-factual knowledge about something like a godentag which is the murder instrument and socage (feudal tenure) which is perhaps more interesting than the crime itself. The tone, as one might expect, is diverting and aristocratic eccentricsabound.