POTTER, RUPERT. Cabinet photograph inscribed and signed on verso ("Rupert Potter"), by Henry Mayson. Keswick, [circa 1903]. 168 x 107 mm. (6½ x 4¼ in.) including mount. A half-length portrait of Beatrix's father, humorously inscribed on the verso: "Rupert Potter Aug. 1903 An excellent photograph and quite unlike our kind friend."