see Poland Street 1 to 9 & 49 to 62 in London Addresses dataset
Stephen Garibaldi ratebooks 9 Poland St 1787-9 / Highfill,Burnim & Langhans. He played bass viol and died 1790 at Calais . There were two "Covent Garden ladies" at this address in 1790 according to Harris's List so it's not clear whether he would have been their landlord