see Poland Street 19 to 44 in London Addresses dataset
Dennis Brennan 39 Poland St (Crispin) ratebooks 1796-1800 / Dennis Brennan wid = Lambeth 26.10.1801 Sarah Hart wid botp banns / Dennis Brennan (married man) bur 5.3.1811 St Marylebone age 64 / the name is distinctly Irish