E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Fire-drake or Fire-dragon.
A fiery serpent, an ignis-fatuus of large proportions, superstitiously believed to be a flying dragon keeping guard over hid treasures.
There is a fellow somewhat near the door, he should be a brazier by his face, for, o my conscience, twenty of the dog-days now reign in s nose . That fire-drake did I hit three times on the head.Shakespeare: Henry VIII., v. 3.