see Poland Street 1 to 9 & 49 to 62 in London Addresses dataset
According to British History Online Thomas Malton lived at 58 Poland St from 1772 to 1780, This accords with an ad giving his address as third house on left in Poland St from Broad St, as this was probably before nos 61 & 62 Poland St were built / in the Royal Academy exhibitions his address was given as 3 Poland St from 1774 to 1777 and 56 Poland St in 1779 / Thomas Malton mathematician of Poland St voted 1774 Percy & Mountmorris / Sun Fire 1783 Thomas Malton engraver Conduit St, Hanover Sq / an ad of 1778 for Mr M writing master at 54 Poland St may also have been him. See DNB Thomas Malton 1726-1801 and Thomas Malton junior 1751/2 - 1804.
Thanks to Andrew Malton of Waterloo, Ontario for emailing me with the marriage of Thomas Malton otp bach at St Marylebone 5.11.1778 to Mary Sharpe of St Giles i t Fields sp. One of the witnesses was Timothy Byrchmore (QV*) who also lived in Poland St. No part of Poland St was in Marylebone parish, though nearby.