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Paul, Sir James Balfour (ed). Registrum Magni Sigilli Regum Scotorum: The Regist...
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Paul, Sir James Balfour (ed). Registrum Magni Sigilli Regum Scotorum: The Register of the Great Seal of Scotland. Edinburgh: General Register House (1882), vol. 2, vol. 2, p. 157, no. 750.