Jean Lament, circa 1810, Portrait of an officer, bust length, watercolour on ivory, signed with m

Jean Lament, circa 1810, Portrait of an officer, bust length, watercolour on ivory, signed with monogram J L lower right, oval 5.5 x 4.5 cm, in a gold mount with a lock of hair verso in the form of a sheath of corn and inscribed 'Getrouw tot in de dood', loosly translated as 'Faithful to the dead' or perhaps 'True to the End'