Paper, 'On the alterations that have taken place in the structure of rocks, on the surface of the basaltic country in the counties of Derry and Antrim' from William Richardson to Humphry Davy 88 manuscript pages and two fold-out watercolour illustrations of surface rock structure at Portmoon and Bengore Promontory at Pleskin near Giant's Causeway in Northern Ireland. Subject: Geology Published in Philosophical Transactions as 'A letter on the alterations that have taken place in the structure of rocks, on the surface of the basaltic country in the counties of Derry and Antrim'. Sent by Richardson from Richhill. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 1, 1832. 18 April 1808