Rather than working a watercolor rapidly, the mid-twentieth-century landscape watercolorist William Thon tended to devote numerous sessions of work to each sheet, always painting indoors, where he could best control the drying rates of washes and ink drawings. As a result, Thon’s watercolors have denser, more built-up surfaces than the modernist watercolors of the teens and twenties. Thon particularly liked the interplay of the successive layers of wash and ink and the fortuitous blurring that often occurred.