"could not forbear vowing Revenge"

This fire-extinguishing incident symbolizes the Treaty of Utrecht, by which the Tories "put out the fire" of war. Gulliver fell into disfavor through his actions, just as the Tories did. In the Tory view, the secret treaty was necessary to avert total disaster. It did indeed stop the war but also brought shame, political destruction and charges of treason.