Two letters to a friend : The first shewing and demonstrating by law, the rights and privileges of pourallees, or free-hey. The other directing the management of that profitable grass call'd saint-foyn, upon barren land, from the author's own experience, and the best collections of all those who are thought to write well on that subject. With a remarkable and particular account when and how, and by what accidental means it first came and was brought over from Nomandy into this Kingdom. By Charles Kirkham, Esq; of Fineshade-Abbey in Northamptonshire.