see Poland Street 1 to9 & 49 to 62 in London Addresses dataset
Mr Ludbey proprietor 61 Poland St Land Tax Redemption 1798 / will PCC 7.8.1819 Thomas Ludbey of Chalfont St Peter Bucks dated 5.5.1803 codicil 19.3.1818 mentioned wife Jane "!all my leasehold houses in parish of St James" (most of these were in Pall Mall and Piccadilly) / SunFire 1796 Thomas Ludbey Esq 74 Harley St