I am trying to identify the maker on this George II mug. Although I am relatively new to this, I believe this is marked London 1732. There are apparently several silversmiths with marks IF or IE (the bottom right corner may not be fully formed) but none that I find registered in the right timeframe. I found one mug with the same mark attributed to John Fawdery, but when I look up his mark it was Fa, not IF. Did he use both?