1. 1
   An essay towards a natural history of Westmorland and Cumberland : Wherein an account is given of their several mineral and surface productions, with some directions how to discover minerals by the external and adjacent strata and upper covers, &c. To which is annexed, A vindication of the philosophical...

   gan Robinson, Thomas, d. 1719
   Cyhoeddwyd 1709

   London : Printed by J.L. for W. Freeman, 1709.

   8 p. leaves, 95, 118 p. ; 19 cm.

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2. 2
   An essay on the geographical distribution of plants, through the counties of Northumberland, Cumberland, and Durham

   gan Winch, Nathaniel John, 1769-1838
   Cyhoeddwyd 1819

   Newcastle : Printed by E. Walker for E. Charnley, 1819.

   52 p. ; 21 cm.

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