View source for Douglas Richardson, awaiting answers

===Question 11===
Robert O'Connor (14 November 2007) : "I note that Douglas Richardson in 'Magna Carta Ancestry' at page 448 refers to the marriage of Isabel de Huntingfield and James de Paunton (died before 1279) as being childless. The various references to this couple at VCH Rutland II, pp 182-8 & VCH Northants, pp 249-52 suggest that they indeed had issue, a son Philip de Paunton who succeeded to his father's manor of Glaston, Rutland and Grendon, Northants. Perhaps James de Paunton had a prior marriage to that with Isabel de Huntingfield and it was from this unknown marriage that the son Philip descended? Can Douglas yield any light on this question? Many thanks, Robert O'Connor."