Paper, an account of a petrified piece of elm by [Philip] Packer Description of a dead elm on the grounds of Mr Purefoy near his house 'Wadley', near farrington in Berkshire. Part of the elm has developed a petrified crust, as if fossilised or ossified, despite being above ground, and Packer cannot explain why. Printed in 'Philosophical Transactions' as: 'An Addition to the Instances of Petrification, enumerated in the last of these Papers' Subject: Botany / Dendrology / Palaeoxyology March 1663