Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-4091815-20160131053636

It was a giveaway commissioned by the network from a fan artist. It has nothing to do with the show. Unless the pages are shown on screen, they are not part of the canon.

The information about mountain ash was provided through dialogue on screen and is canon. To deny the information presented one must create exceptions and special rules not presented on screen.

I'll just stick with the information presented on the show.