In a manuscript from the later 13th century, Arthur's shield has three gold leopards, a likely heraldic flattery of Edward I of England (Brault, 22). Geoffrey of Monmouth assigned Arthur a dragon on his helmet and standard, which is possibly canting arms on Arthur's father's name, Uther Pendragon (Brault, 23).
The River Thames, its the only land feature you listed
It was at a public science exhibit but I may be wrong
