see Poland Street 10 to 18 & 45 to 48 in London Addresses dataset
Francis Gibert 12 Poland St ratebooks 177 7-1804 / Francois Gibert (perfumer in Marr Lic) = St James 10.7.1771 Marie Francoise Rose Berthey / 1777 ad for AB dancing master c/o Gibert perfumer Poland St / ad 16.7.1782 mantua maker seeks place c/o Gibert perfumer 12 Poland St / ad 9.6.1784 Mr I.H.H. native of Switzerland seeks place travelling abroad / ad 7.3.1786 for lodgings in Paris / Bailey's 1788 Francis Gibert perfumer / ad 11.6.1789 T.L.P. seeks place as valet / ad 3.10.1795 ad for chemical liquor / ad 3.7.1798 Swiaa governess seeks place / Francis Gibert bur 3.7.1800 St Marylebone / will PCC 23.11.1810 Rose Gibert widow of Gt Marlborough St mentioned Susanna List for care in illness, Thomas Gedling of Fleet St banker, Mrs Victoria Deville of Gt Marlborough St, proved by Francis Gedling / Rose Gibert bur St James 15.11.1810 adult (FamilySearch has age 18 looks like error)