Lease by Nathanyell Hallowes of Derby, Gent Robert Walker of Alvaston, Gent and Samuel Sleigh of Derby, fellmonger, to Thomas Blackwall of Mansfield Woodhouse (Notts), Esq., for the performance of covenants in an agreement between the parties, of all coals, coal mines, veins of coal and delphs at Dethick, for 18 years 29 Aug 12 Charles I 1636