I have managed to confirm the folowing regarding Matthew SALT of Alton.
Matthew SALT born 1788, baptised 22 June 1788, Alton, son of Thomas Salt and Elizabeth (nee Brindley).
Thomas and Elizabeth had married on 21 July 1771. Elizabeth’s father was Joseph Brindley, brother of canal engineer James Brindley.
Matthew SALT married (1) Sarah Robinson, aged about 18, on 02 Aug 1813, St.Peter’s Church, Stoke-on-Trent. They had son John and possibly daughter. Sarah SALT was buried aged 20, on 28th April 1815 at Stoke. She had lived at Lane End in Longton.
Matthew SALT married (2) Mary Handley on 11 Sep 1817, Stone. One of the witnesses was a Sampson Handley, possibly her brother, born 1790. Mary was baptised in Milwich on 12 Nov 1792. The parents of Sampson and Mary were John and Sarah Handley. Matthew and Mary had at least 5 children, born in Staffs and Cheshire.
Matthew SALT married (3) Jane Ward (nee Hancock) 1844 – they both lived and died in Macclesfield.
So now my search starts afresh with delving into the Handley family. Yippee!

Thanks, Claire