Probably nothing in this at all but I do like a tenuous connection

In the linked Glassmakers paper, there are some fragments from a handled linen smoother shown as being excavated from Bickerstaffe.
Bickerstaffe has a connection to the Earl of Derby. See paper on excavation of c.1600 Bickerstaffe Glasshouse.
https://www.merseysidearchsoc.com/uploads/2/7/2/9/2729758/jmas_9_paper_1.pdfMy linen smoother was posted to me from Solway Firth area which I think is where Kirkcudbright is.
Kirkcudbright is where the similar, also handled linen smoother from William Bell is in the Stewartry museum.
Initially the only link I could find between Bickerstaffe/the Earl of Derby and Kirkcudbright was an invasion by the Earl of Derby on Kirkcudbright in 1507

. This is too early for a Huguenot glass item from later 1500s glasshouse at Bickerstaffe.
However, it seems in August 1650 a Lady Derby wrote from Kirkcudbright a letter to her sister-in-law. Lady Derby was in Kirkcudbright en-route from the Isle of Man:
http://www.isle-of-man.com/manxnotebook/fulltext/lw1874/ch07a.htmSo, not putting 2 and 2 together and making five BUT ... IF they were linen smoothers, then just saying ... maybe Lady Derby was travelling with lots of linen and a servant and left her Bickerstaffe made linen smoothers in Kirkcudbright

Although I've no idea what the black glass at Bickerstaffe looked like. Mine could be completely the wrong colour of course.