Him se yldesta andswarode; werodes wisa, wordhord onleac.
"That noblest of men answered him; the leader of the warrior band unlocked his wordhoard."
Unless you count the Loch Ness Monster of course :-) Vita Columbae, cap. 28...
(cries)Next you'll tell me there's no Easter Bunny.
What? But "Welsh dragon" is the number 1 search term to find Heavenfield! Don't worry Jennifer...just look at the Welsh flag and you'll see all the proof you need for medieval dragons. :-) All those lovely caves in Wales that belch blue flames and nasty smells are all the proof good medieval folk needed that a dragon lurked there. (Ignore those folks who say its methane given off by coal that sometimes catches fire...what do they know.)
I still like to believe that the chronicler for the year 793 of The Anglo-Saxon Chonicle actually saw the "fiery dragons... seen flying in the air" of which he wrote.