In all the years I've been married, we've hardly ever had a postal address with a house number or a street name.
Our address has always been 'c/o' (husband's designation), followed by the name of a tea garden, a Post Office, and a district name. A bit like the Phantom, who sends a man to collect 'any mail for Mr. Walker' from the Post Office in Denkali, a tea garden manager has a 'dak wallah' who goes to the nearest post office every morning to drop off and pick up letters.
