My true love sent to me: a partridge in a pear tree. In the original song it seems that 'my true love' is God, that the partridge symbolizes Christ, and the pear tree represents the Cross. Well, maybe.
But in Britain, until last year, if you wanted to deal in game - not just partridges but pheasants, hares, grouse, moor game, woodcock, deer, or rabbits, you needed a licence from the local authority under section 18 of the 1831 Game Act (plus an excise licence from the Post Office under section 14 of the 1860 Game Licences Act). The 1831 legislation laid down strict rules on when game could be sold - an attempt to ensure that breeding cycles were not disrupted. In other words, the law has only just caught up with refrigeration.