through the vigor of their personality – the first was Rembrandt, the second was Van Gogh, and the third is Mondrian." As the years progressed, lines began to take precedence over forms in Mondrian's paintings. In the 1930s, he began to use thinner lines and double lines more frequently, punctuated with a few small colored forms, if any at all. Double lines particularly excited Mondrian, for he believed they offered his paintings a new dynamism which he was eager to explore. The introduction of the double line in his work was influenced by the work of his friend and contemporary Marlow Moss. From 1934 to 1935, three of Mondrian's paintings were exhibited as part of the "Abstract and Concrete" exhibitions in the UK at Oxford, London, and Liverpool. London and New York (1938–1944) In September 1938, Mondrian left Paris in the face of advancing fascism and moved to London. After the Netherlands was invaded and Paris fell in 1940, he left London for Manhattan in New York City, where he would remain until his death. Some of Mondrian's later works are difficult to place in terms of his artistic development because there were quite a few canvases that he began in Paris or London and only completed months or years later in Manhattan. The finished works from this later period are visually busy, with more lines than any of his work since the 1920s, placed in an overlapping arrangement that is almost cartographical in appearance. He spent many long hours painting on his own until his hands blistered, and he sometimes cried or made himself sick. Mondrian produced Lozenge Composition With Four Yellow Lines (1933), a simple painting that innovated thick, colored lines instead of black ones. After that one painting, this practice remained dormant in Mondrian's work until he arrived in Manhattan, at which time he began to embrace it with abandon. In some examples of this new direction, such as Composition (1938) / Place de la Concorde (1943), he appears to have taken unfinished black-line paintings from Paris and completed them in New York by adding short perpendicular lines of different colors, running between the longer black lines, or from a black line to the edge of the canvas. The newly colored areas are thick, almost bridging the gap between lines and forms, and it is startling to see color in a Mondrian painting that is unbounded by