(1) Villenfagne, H. baron de[in French] (1788). "Discours sur les artistes liégois". Mélanges de littérature et d'histoire (in French). Liège: F. J. Desoer. pp. 141–142. Retrieved 9 January 2021.;
(2) Becdelièvre-Hamal, comte Antoine Gabriel de (1837). Biographie liégeoise (in French). Vol. 2. Liège: Jeunehomme Frères. pp. 405–407 – via Bavarian State Library. Becdelièvre-Hamal closely followed Villenfagne.
(1) Villenfagne, H. baron de[in French] (1788). "Discours sur les artistes liégois". Mélanges de littérature et d'histoire (in French). Liège: F. J. Desoer. pp. 141–142. Retrieved 9 January 2021.;
(2) Becdelièvre-Hamal, comte Antoine Gabriel de (1837). Biographie liégeoise (in French). Vol. 2. Liège: Jeunehomme Frères. pp. 405–407 – via Bavarian State Library. Becdelièvre-Hamal closely followed Villenfagne.
Grove says he was "not a society man";[2] but this contradicts baron de Villenfagne [fr], a nobleman born in Liège the year after Hamal died, who in all probability knew people who had known him.[6]
(1) Villenfagne, H. baron de[in French] (1788). "Discours sur les artistes liégois". Mélanges de littérature et d'histoire (in French). Liège: F. J. Desoer. pp. 141–142. Retrieved 9 January 2021.;
(2) Becdelièvre-Hamal, comte Antoine Gabriel de (1837). Biographie liégeoise (in French). Vol. 2. Liège: Jeunehomme Frères. pp. 405–407 – via Bavarian State Library. Becdelièvre-Hamal closely followed Villenfagne.