Letter, from Martin Lister to Henry Oldenburg, dated at York Signed autograph Two transcribed extracts from letters from Jessop: one concerning a straight line being equal to a curved one; the another about subterraneous hot air and fungus from caves and mines Read to the Royal Society on 22 January 1673 Transcription in 'The correspondence of Henry Oldenburg', ed and trans by A Rupert Hall & Marie Boas Hall, vol 10, p 424 7 January 1673