Does anyone have any information on a gunmaker who signed guns "E. London"? Apparently he work at an address of "London Wall, London" (I think I just used up my quota of using the word "London" today).

I found almost nothing on the internet, except another gun with his name and address. Anyone know during what time frame he produced guns? Thanks

“I left long before daylight, alone but not lonely.”~Gordon Macquarrie