I'm not exactly sure where Stoffel Long was working but I always assumed it was very close to Jacob George. The George's were up in Greenwich twp., Berks County ("A true and perfect inventory... which were of Joseph Henry George late of Greenwich Township in the County of Berks and State of Pennsylvania Gun Smith deceased" [1804]) Anyway, I was just looking through the estate papers of Daniel Christ (blacksmith/barrelsmith) also of Greenwich twp., 1824, and there are many names in accounts payable and receivable; some familiar names include "Jacob George Senr.," "Tobias Grob," "Stoffel Smith," "Andrew Fichthorn Junr.," and of course "Stoffel Long." Still not sure where he lived and worked but he was doing business with the Christ smithy in Greenwich township along with Jacob George Sr.