I suggest taking some of Bob Hall's book with a pinch of salt. IMHO, no more than 3/4 of the 'Bacchus' weights were made by Bacchus, for example. And Queen's Head canes are pretty rare in Bacchus - not an indicator that a weight was made by them. And Gillinder didn't work for Bacchus, etc. I think it is a very good book - but like all reference books, it is now out of date, and thinking and understanding have moved on over the years.
The weight you refer to on page 81 looks like a Richardson piece to me - but without measuring the density it is hard to say much more. But I don't see any canes in it that need to have come from France, rather than Stourbridge.