| Description | The address and docket are on a separate wrapper. Docketed “About steam carriages.” Summarised “Ravenhead engine. Should put a dozen engines in hand. About the insult received at the mines. The Hornblowers. Wheal Virgin requires as large an engine as Watt can construct. The advantages of double-acting pumps. About removal of Cornish engines to Ireland. Valuable remarks on Murdock and the wheel carriage.” |