    Sentence 1: Approximately how many gems  in Reverend Chauncy Hare Townshend's  collection was given to the museum?    Sentence 2: Major bequests include  Reverend Chauncy Hare Townshend's  collection of 154 gems bequeathed in 1869,  Lady Cory’s 1951 gift of major diamond  jewellery from the 8th and 19th centuries,  and jewelery scholar Dame Joan Evans’  197 gift of more than 800 jewels dating  from the Middle Ages to the early 19th  century.