Yarnolds 13.2.1805 at R Taylor
I found no connection between Richard Taylor DNB 1781-1858 printer and any Yarnolds, which was a name from Worcestershire and the Welsh borders while Taylor's family was from Norwich, and no Yarnolds in British Book Trades Index. Some London Yarnolds in work notes below

Work notes: 
William Yarnold coal merchant Soho from 1774 churchwarden of St Anns Soho 1797 Vice Treas Society of Ancient Britons 1798 his will PCC 1827. He voted Fox 1780 Hood & Wray 1784 Paull 1806 Romilly & Maxwell 1818 / Charles Yarnold surgeon Gt St Helens will PCC 1825 Mr Yarnold steward 1804 of gentlemen educated at London Hospital / Benjamin Yarnold musick master Sun Fire 1778, Charles Yarnold son of Benjamin musician of Hammerton apprenticed 1795 to Joseph Steele musician, none of those names appeared in Doane's Musical Directory 1794, Mr Yarnold actor singer & dancer in London from 1815 "from the Bath theatre" (Highfill, Burnim & Langhans)