Recently discovered painting

The reading passage and the lecture are both about recently discovered paintings of a women in a white dress. The author mentions although it is not a signed painting but it is possible that it is another early work by famous American painter James McNeill Whistler. The lecturer disputes the claims made in the article. His position is that though the painting contributed to painter's friend but it is not by Whistler. According to the reading passage, the painting was added in an exhibition after three years of Whistler's death. The article mentions that, that exhibition was arranged by Whistler's close friend who thought it was Whistler's work. This argument is challenged by the lecturer. He claims that the exhibition showcashed various other paintings done by other painters. Additionally, he points out that someone could make it look like it was painted by Whistler. Secondly, the author suggests that the woman in the painting also look like the woman in another of his paintings. In the article, it is said that the painting distinctly similar to Whistler's later work which used monochoromatic palate identical to his most pamous painting: "Arrangement in Grey and Black". The lecturer, however, asserts that the woman in the painting was a popular modal who appered in other paintings. He goes on to say that the monochoromatic palate usage at that time in paintings was very popular too. Finally the author posits that Whistler did not signed the painting but he drew a butterfly which Whistler painted in many other paintings. The author contends that it was in the lower right corner of the painting. In contrast, the lecturer's stance is that the bufferfly had different color, shape and the position of the butterfly was in lower right corner instead of upper left corner. He notes that someone could use it to make it look like his paintings.