his contributions to an exhibition at the Ontario Society of Artists. In January 1913, MacDonald and Harris traveled to the Albright Art Gallery, today's Albright-Knox Gallery, in Buffalo, New York, where they attended the Exhibition of Contemporary Scandinavian Art and saw post-Impressionist and expressionist landscape paintings by artists such as Gustaf Fjaestad and Vilhelm Hammershøi. The two artists felt that the approach to the northern Scandinavian wilderness could be adopted by Canadian painters to create on canvas a truly Canadian form of landscape art. Later that year, commercial artists based in Toronto began to show interest in the potential of original Canadian expression; these artists began to congregate around MacDonald and Harris. In the spring of 1913, MacDonald wrote to A. Y. Jackson, inviting him to come to Toronto, which he did in May. MacDonald created the poster Canada and the Call (1914) soon after the outbreak of the First World War. Intended as a promotional poster for the Canadian Patriotic Fund, Canada and the Call advertises an exhibition of paintings organized by the Royal Canadian Academy of Arts. In March 1916, MacDonald exhibited The Tangled Garden at the Ontario Society of Artists. Though derided by art critics of the day, it was a fairly conventional post-impressionistic painting of sunflowers—one that recalls Vincent van Gogh's treatment of the subject from nearly forty years before, but in which MacDonald would have relied on sketches of sunflowers he made in his own garden at Thornhill, Ontario. Accustomed to the smooth blending and muted tones of Canadian academic art in the style of the Canadian Art Club, the critics were taken aback by the brightness and intensity of the colours. The art critic for the Toronto Daily Star called it "an incoherent mass of color". Hostile art critics thereafter singled out MacDonald for attacks in the press. In the autumn of 1918, MacDonald, Harris, and other artists interested in their new Canadian approach to painting travelled to the Algoma district north of Lake Superior in a specially outfitted Algoma Central Railway car that functioned as a mobile artist studio. The group would hitch their car to trains travelling through the area, and when they found a scenic location, they would unhitch and spend time exploring and painting the wilderness. MacDonald would return to Algoma with his colleagues for the next several autumns. These trips would produce some of his most acclaimed paintings, including