There was a Thomas Hall in Kent for instance, early 18th century in Maidstone. There is a Longford in Sevenoaks, twenty miles from Maidstone. EDIT I have the book on Kent makers. Loomes lists him as early 18th century but the clock by him in the book by Michael Pearson is a 1760s clock when Hall was in the Maidstone area. Hall is known to have numbered his clocks, but only because this clock is numbered 77. No other clocks are known. However 77 would suggest he had been making them a while. He does seem to have been a high quality maker from this one example, and he had his own style of case too, unlike other local makers. According to Pearson the only other Kent maker who had a similar style was John Mercer. We have one of his here in the hall.