Information on Tripe & Elder

My grandfather's family came from the Ashton-Underline area of England. In my very younger days I remember him talking about "Tripe and Elder" I know what tripe is, but what is Elder (I may not even be spelling it right)? I saw a reference on a website stating that it was pressed cows udder, is this correct?
I remember he used to travel here in America almost an hour to purchase it from possibly a market or store. I would be quite interested in knowing the history of this dish if anyone knows. I can get the tripe and fresh udders (if that is what the elder is).

Thanks in advance