For the record:
Sam McGredy IV in the 1971 reference quoted 'Independence' as the pollen parent's pollen parent.
In other references 'Tantau's Triumph' (syn 'Cinnebar') is quoted.

I note Mr. McGredy used both in previous years:
'Independence' as a pollen parent for his 1961 'Hassan'
and 'Cinnebar' as a pollen parent for his 1965 'Athlone'.