Etching on zinc plate - Signed on plate in small letters at the bottom right. - On the lower right margin, it is signed in pencil. - References: A. Taevernier, Graphic works of James Ensor, 1973, Pl. T. 3, pag. 315, 3,Elesh 132 - This etching has been given another title by Croquez: “ Pollution all around ”. The subject is a portrait of Ensor's friends. From the left to the right: Ernest Rousseau, Ensor's sister, Ensor himself, Mrs. Rousseau.