see Poland Street 10 to 18 & 45 to 48 in London Addresses dataset
Scourge Dec 1815 p411 letter from son of John King DNB c1753-1823 (probably George King) saying he went by the name of Jervoise Biddulph 16 Poland Street as a front for his father's "business" activities. There were at least 63 ads from 7.5.1794 to 1.5.1795 giving that name and address. Jervoise and Biddulph were both names of gentry in the Shropshire area but I found no-one baptised married or buried with the name Jervoise Biddulph. The ratebooks for 16 Poland St have the name Jervoise Biddulph for1795. See my Background Article "King of the Swindlers". The book of that name pretended to have been a diary of John King's found in a cab near an advertising moneylender's in Poland Street