Reply To: Stowford Mills (Ivybridge)

In answer to a question about possible link between Ivybridge and Ivy Mill Pennsylvania  –

Papermaking: The History and Technique of an Ancient Craft By Dard Hunter p275 has:

In the year 1729 Thomas Willcox set up the third paper mill in the colony of Pennsylvania. This establishment used as a standard watermark a dove and olive-branch design with the initials of the papermaker — first TMW for the founder, and in later years MW, the initials of Mark Willcox, the son, who was operating the mill in 1767.
In 1827 an ivy leaf was adopted as a watermark, the mill being known as Ivy Mills on account of the English ivy that covered the stone buildings. The original vine was brought from England by Thomas Willcox to Pennsylvania in 1725, from near the Old Ivy Bridge in Devonshire. 

This book is available on Google Books along with other excellent books by Dard: https://books.google.co.uk/books?id=1sEp3rtK994C