Hello, Tigger,
Duck Lane & Yard, St John, Westminster.
1851 census
Duck Lane, Wardour St.
HO107/1483 folios 76 -77
Duck Yard, Gt. Peter St.
Northern end
HO107/1480 folios 228 -229
southern end
HO107/1479 folios 351 - 356
mixed numbers, 327. 379 -380
Hope this is of use,
Meliora