Rosemary Lane is a Blighter stronghold in the City of London, one of Bloody Nora's three. The Rooks take it over once the twins clear it.
The Blighters knocked down part of the lane's slums to build their stronghold.
Clearing it in the Rosemary Lane stronghold memory weakens the Blighters across the City of London.
The leader shrugs off Bloody Nora's warnings about the new gang and admits that, with Kaylock dead, the Blighters' expansion plans are on hold. Captured Rooks are held here; full sync wants them freed and kept alive, and the leader killed without being seen, so free the prisoners quietly before you move on him.
It is one of Nora's three City strongholds with Field Lane and Black Swan Yard. Henry Green's leads point the twins to it as part of breaking the Templar grip on the City of London.
Bank of England
The Bank of England is the City of London's central bank and the target of Sequence 6, A Run on the Bank, where Jacob tracks a Templar robbing its branches. You return to its vault twice more: once for the stolen printing plates and once in The Last Maharaja.
Black Swan Yard
Black Swan Yard is one of Bloody Nora's three Blighter strongholds in the City of London, set beside the river. Capturing it for the Rooks is part of taking the borough.
Cannon Street station
Cannon Street station is a City of London rail stop on the north bank of the Thames. In the Jack the Ripper expansion it is where four of Jack's gang lieutenants gather, and Evie clears them out.
Field Lane
Field Lane is one of Bloody Nora's three Blighter strongholds in the City of London. Taking it from the Blighters is a step toward the City gang war.