Letter from Philip Skelton, Monaghan, to John Boyle, 5th Earl of Cork and 5th Earl of Orrery Text published as 'A letter from the Right Hon. John Earl of Orrery to Martin Folkes Esquire, Pr.R.S. inclosing an account of the Cornel-Catterpillar, contained in a letter from the Reverend Mr. Philip Skelton to his Lordship', Philosophical Transactions of the Royal Society, v.45, no.487, pp.281-296. With a small figure of caterpillars on a tree branch. With a cover sheet: 'John Boyle, 5th Earl of Cork and 5th Earl of Orrery to Martin Folkes Esq., President of the Royal Society, Caledon 6 April 1748' Endorsed verso: 'no.5 Apr.21.1748. pr. Tr.487. III.' 29 March 1748