This extraordinary painting, belonging to the National Gallery in London and bearing the monogram of Théo Van Rysselberghe, was compared in 2006 with the Divisionist works lent to us for our retrospective exhibition. We wanted to take advantage of this temporary laboratory to gain a better understanding of the artist’s technique when he devoted himself to the chromatic division of Neo-Impressionism. Between 1888 and 1894, the artist’s neo-period, he painted numerous portraits and landscapes as well as animated scenes. Apart from the subject, none of his works from this period bears the slightest technical resemblance to the painting in the National Gallery. On the contrary, this one has a very thick layer of paint, unlike any other work by Van Rysselberghe. According to our current knowledge, this painting, which is undoubtedly by a great hand, cannot yet be included in Theo Van Rysselberghe’s body of work. Nevertheless, depending on the discoveries and technical examinations that are to be made, we would be happy to challenge our current opinion.