* Grant G. Simpson, “ An Anglo-Scottish Baron of the Thirteenth century: the Acts of Roger de Quincy Earl of Winchester and Constable of Scotland ” ( Unpublished PhD Thesis, Edinburgh 1963 ).

* Grant G. Simpson, “ An Anglo-Scottish Baron of the Thirteenth century: the Acts of Roger de Quincy Earl of Winchester and Constable of Scotland ” ( Unpublished PhD Thesis, Edinburgh 1963 ).

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