Two dissertations, upon the mint and coins of the Episcopal-Palatines of Durham : with an appendix: containing, writs, patents, licences, appointments &c. relating to the same, many of which are taken from the close rolls of the chancery of Durham : to which is added an account of several hundred English, Scotch, Irish and Brabantine coins, discovered near Thrapstone, in Northamptonshire, in the year, 1778 /