STANSTED MOUNTFITCHET, U.K. – A Tudor manuscript designed to help with swan-keeping in the era when mute swans were owned by the English crown comes to auction in the summer. The two-volume manuscript in Sworders’ August 23 sale of Books and Maps was used from the 16th to the 19th century by landowners in Norfolk and Suffolk. This example, consigned from the estate of Cambridgeshire antiques dealer Peter Croft (1924-2001), is estimated at £8,000-£16,000. Absentee and Internet live bidding will be available through LiveAuctioneers.