Sherlock Holmes: The Adventure of the Beryl Coronet

A*Streatham*banker named Mr Alexander Holder makes a loan of £50,000 (equivalent to approximately £5.76*million in 2019[1][2]) to a socially prominent client, who leaves a*beryl*coronet*- one of the most valuable public possessions in existence - as collateral. Feeling his bank's personal safe is insufficient to protect such a rare and precious piece of jewellery, he takes it home and keeps it in his dressing room. However, he and his niece Mary later find his son Arthur holding the coronet...