Note:
London
Probably this is the original publisher of
The Boy's Own Magazine. Wikipedia provides a front cover image of the second, February 1855 issue with this footer:
"Clarke and Beeton, 148, Fleet Street."
and identifies
Samuel Orchart Beeton as the founder of that "first and most influential boys' magazine". --Wikipedia
Beeton was a London publisher in his own name, as S. O. Beeton, in 1865.