A Slip of the Anvil on Downton Abbey: Did you catch the reference?

Here's some trivia for a February Sunday afternoon: how closely are you paying attention when you watch television?




Notice the horse being shod in the background as the
wedding proceeds. 


If you're like me, you'll be glued to the television tonight for the final episode of the second year of the PBS/BBC mini-series Downton Abbey. 



And if you're also anything like me, you knew that,