He was already a well trained artist and soon became well known for his sensitive watercolor views of the Hudson River Valley and surroundings.
Wall's landscapes (and a few seascapes) were straightforward representations of America's awe-inspiring vistas—neither romanticized nor idealized.
[1] His paintings were popular during his lifetime and many sold for prices between three and four hundred dollars – high for the period.
[2] Wall was a founding member of the National Academy of Design (New York),[1] where fifty-nine of his paintings were exhibited over twenty-five years.
[2] He also exhibited frequently at such institutions as the Pennsylvania Academy of the Fine Arts (Philadelphia) and the Apollo Association (New York).