Could be the name of a house. Have you got a house number or surname we can work on.
Apologies for now going slightly off topic.
In 1950s I vaguely remember some of the big houses in Camden St (opposite St Andrews Square flats) seemed to have no buildings behind them as far back as Hemingford St where there were high walls at the back.
Which brings me to the map showing the mission hall
The Charles Thompson Mission, is still run from the Hemingford Street building that has housed it since 1892.
see 1950s map below on the other side of road to bert's map