When did the "over the hill" line come in, and the "pints of ale and bottles of sherry"? Pavane, upthread, records a C19 version which begins with two tradesmen who

called for a bottle of sherry
That over it they might be merry

but the idea of ordering bottles of sherry, plural, seems like a more recent adaptation/garbling. There don't seem to be any hills in the older versions, either.