 He also cites a charter from the cathedral of Astorga dated 14 April 1107 where Alfonso VI grants some fueros and acts "cum uxore mea Elisabet et filio nostro Sancio" (with my wife Isabel and our son Sancho).This is the only document where Sancho is referred to as "our son", since in others he only appears as the king's son even though Queen Isabel also confirms the charters.Reilly accepts that there were two Isabels