A letter to Sir John Sinclair, Bart. M.P containing a statement of the system, under which a considerable farm is profitably managed in Hertfordshire - Greg, Thomas 1718-1796 (s.n, 1809)
"Given at the request of the Board.". - Goldsmiths'-Kress no. 19794. - OCLC, 15553269. - Reproduction of original from Goldsmiths' Library, University of London