John TURNER was married to a woman called Sarah but that's all we know about her.  

She may have been Sarah HAMMOND, the (at the moment unidentified) daughter of a family of button makers in Birmingham .  It is possible that, upon their marriage, John TURNER become a partner in the company.  How else does one explain the fact that an 1783 directory of Birmingham lists a button makers called Hammond, John and Samuel, of Snow Hill and by 1830 there a button makers called Hammond, Turner (note the comma) of 100 Snow Hill is listed in a Warwickshire directory and a child of John TURNER is called Samuel Hammond TURNER.