Wilsons of Bannockburn by Roy Erskine (Andy Marray's grandfather)

Publisher: Scottish Postal History Society (Nov. 1 2011)
ISBN-10: 1908139013
ISBN-13: 978-1908139016

This is out of print but available from Amazon and the like. It's a facinating read through the medium of Wilsons' correspondence about how the postal system developed in Scotland in the early-mid 19th century.

Wilsons' international trade was very well developed by the 1820s and the uses of their tartan extensive. The section on military tartans has some interesting nuggets that help to throw light on regimental tartans at the time.

Definitley one for those with a deeper interest in Wilsons and early tartan commerce.