Project Introduction
[http://www.nga.gov/content/ngaweb/research/casva/research-projects.html A Project of the National Gallery of Art, Center for Advanced Study in the Visual Arts ]

Fig. 1, Anonymous, "Plan of a Suburban Garden," in A. J. Downing, ed., Horticulturist 3, no. 8 (February 1849): pl. opp. p. 353.