This is the name of a well known premium beer in Yorkshire.
The name, Theakston, is all that the previous statement has, appart from Yorkshire, to do with this post.
There is available on the Archive site, a book called -
'British Angling Flies' by Michael Theakston.

http://www.archive.org/search.php?qu...iatype%3Atexts
It is a very interesting book with a lot of old patterns/recipes.