Letter, from John Wallis to Edmond Halley, dated at Oxford Further details about the child with six fingers and toes (mentioned in EL/W2/41), who was called David Richardson, but has now died; concerns carrying out experiments on projected bodies; that Dr Plot has measured a cucumber of nearly four feet in length, which grew in Dr Jacob's garden; discussing remedies for gout, dropsy, rheumatism; account of the eruption of a spring in Yorkshire Read to the Royal Society on 6 December 1686 25 November 1686