SEEING how many unstable ex-soldiers came to the Lodge of Instruction (attached to Faith and Works E.C. 5837) in the years after the war, the wonder is there was not more trouble from Brethren whom sudden meetings with old comrades jerked back into their still raw past.
This is from "The Madonna of the Trenches" by Rudyard Kipling.
http://www.telelib.com/authors/K/KiplingRudyard/prose/DebtsandCredits/madonnatrenches.html
I don't understand the meaning of "E.C. 5837"
Is this an address number in London?
I am glad if someone would kindly teach me.