Hi everyone.
My 3 x great aunt, Eliza Blyth nee Smith had a son called Samuel David Blyth. They all moved to Canada, although I'm not sure Eliza stayed there.
Samuel David later enlisted into the Canadian Army, and on his Attestation Paper (attached below, I have no idea why it says he was born in Glouchester, he was actually born in Lowestoft!), he stated his next of kin as his father, Samuel David Blyth, whose address was 20 Abbey Lane, King Street, Norwich. I've been trying to look into this address, but I can't find it anywhere! I've looked through the 1911 Census and I found an 18, 19 and 21 Abbey Lane, but no number 20.

Does anyone know why this could be?
Thank you!