Dr John Kanefsky writes: In my paper to IEEC2 on the Norris Files, I referred briefly to the paucity of evidence about brass cylinders for Newcomen engines [Kanefsky (2021), Coalbrookdale, Cornwall and Cylinders, pp.6-7 – see also early access version]. However, an advertisement in the Newcastle Courant for 3rd April 1725 sheds a little light.  In it, a Mr William Packer of Bristol who has relocated to Newcastle offers to cast, among a wide variety of other items, “all Sorts of Brass-work for Fire-Engines for the Coal Works”. Little is known about Packer.  From a brief search on the internet it appears he as active as a bell-founder and supplier…