Phew! Thank you so much for pointing me to National Archives. Yes, much clearer (although the jargon as always proved difficult) and, as thought, after the usual directions that all funeral expenses etc be paid he gives and bequeaths all the residue both real and personal equally between his two children, son William Horne and Sarah (wife of John Williams) equally share and share alike and to their heirs, Executors, Administrators and Assigns according to the respective nature and qualities thereof he appoints his friends to be Executors of his Will made on 9th April 1824. No mention of his wife, of course, because she had already passed away.
Many thanks to everyone who has helped to pass most of a day of this boring lockdown! Very much appreciated.