 The second roll was presumed lost by the 1780s , but actually remained in the hands of the royal family . William IV gave it to Mary <unk> , one of his illegitimate children by the courtesan Dorothea Jordan , sometime in the early 19th century . In 1824 , <unk> married Charles Robert Fox , a major @-@ general and from 1832 – 35 an officer of the surveyor of the ordnance , the same position Anthony Anthony had three centuries before him . Fox was a bibliophile , and historian Charles Knighton has suggested he knew the value of the roll , but its location nevertheless remained unknown to scholars . In 1857 Frederic Madden , keeper of manuscripts at the British Museum , was shown the second roll and learned that Mary Fox wished to sell it . After negotiations it was sold for £ 15 to the British Museum and was numbered Additional MS <unk> . It was kept in its original format as a roll and has been stored in the British Library 's manuscript collection at St Pancras since 1999 . 
