Friedlander (1867 -1958) in Amsterdam dated 1947, attributing the panel to Thomas de Keyser. Letter dated January 15, 1950 from Aleksandr Troubnikoff (1908-1988), former curator of the Hermitage in St
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Friedlander (1867 -1958) in Amsterdam dated 1947, attributing the panel to Thomas de Keyser. Letter dated January 15, 1950 from Aleksandr Troubnikoff (1908-1988), former curator of the Hermitage in St