I'm reading Herman Melville's novel "Redburn," and in ch. 40 ('Placards, Brass-Jewelers, Truck Horses, and Steamers'), the narrator says, "I was astonished at the multitude of gilded balls in these streets, emblematic of their calling. They were generally next neighbors to the gilded grapes over the spirit-vaults; and no doubt, mutually to facilitate business operations, some of these establishments have connecting doors inside, so as to play their customers into each other's hands. I often saw sailors in a state of intoxication rushing from a spirit-vault into a pawn-broker's; stripping off their boots, hats, jackets, and neckerchiefs, and sometimes even their pantaloons on the spot, and offering to pawn them for a song. Of course such applications were never refused." It's interesting that your citation is from the 1841 census, because "Redburn" was published in 1849, and the scene described is in Liverpool, England. From this I would say that "vault" is a generic term, although I suppose the name of the business could contain the word "vault." Being curious about spirit-vaults, I googled it and came upon your question/comment.