Imagine the conversation that came before this response? Response: The keeper's office dates from the 13th century.
DIALOG:
[a]. What is the Keeper of the Queen's Swans?
[b]. Keeper of the Queen's Swans The Keeper of the King's/Queen's Swans was a late medieval-founded office in the Royal Household of the Sovereign of England, later Great Britain and ultimately the United Kingdom.
[a]. What are some of the duties of the Queen's Swans?
[b]. He was earlier called the King's/Queen's Swanmaster.
[a]. Is the Queen's Swans still in use?
[b]. The office was replaced by two separate roles in 1993 for the annual Swan-Upping marking and health-checking carried out using Thames skiffs on many of the non-tidal reaches of the River Thames in latter years from Sunbury-on-Thames passing Windsor, Berkshire to Henley on Thames.
[a]. How old is the Queen's Swans?
[b]. 