Blott was probably Eugène Blot, a collector and art dealer.
Blott became interested in the works of the Impressionists in 1882 when he saw their pictures in the collection of Dr Filleau. The first paintings he bought were by Boudin, Guillaumin and Pissarro. He became the principal seller of Guillaumin's works. In 1900 he held a sale of works at the premises of Drouot Antique dealers, including paintings by Bonnard, Boudin, Caillebotte, Gauguin, Guillaumin, Jongkind, Berthe Morisot, Pissarro, Renoir, Toulouse-Lautrec and Vuillard.
In 1878 Blot and JW were in correspondence concerning certain financial transactions. Charles Augustus Howell appears to have used a cheque made out by JW to Blot for £110 as security for the payment of his own debt to Blot, causing friction [#00309, #02183]. As a result, JW suggested that Blot take a picture of his as security until Howell payed him the required sum [#09002]. It appears that JW gave Blot Arrangement in Grey and Black, No. 2: Portrait of Thomas Carlyle (YMSM 137) as security for the sum of a £150, agreeing to pay interest, and offering other pictures as security if a sum of £400 could be advanced [#10340]. It appears however that Blot's lawyers still threatened legal action [#09255].
Chelsea, Pimlico, Belgravia Directory, London, 1881; Pennell, Elizabeth Robins, and Joseph Pennell, The Life of James McNeill Whistler, 2 vols, London and Philadelphia, 1908; Monneret, Sophie (ed.), L'Impressionisme et son époque: dictionnaire international, Paris, 1978.