The Architecture of Country Houses
- Online text of the book by A. J. Downing with 320 illustrations, which was published in 1859. From Making of America.
- http://quod.lib.umich.edu/cgi/t/text/text-idx?c=moa&idno=ADQ1020.0001.001&view=toc

A Treatise on the Theory and Practice of Landscape Gardening
- Online text of the book by A.J. Downing, published in 1859, from Making of America Books.
- http://quod.lib.umich.edu/cgi/t/text/text-idx?c=moa&idno=AJQ8330.0001.001&view=toc

Downing, Andrew Jackson
- Brief biography from the Columbia Encyclopedia, Sixth Edition (2001).
- http://www.bartleby.com/65/do/DowningAJ.html

Andrew Jackson Downing
- An illustrated biography by Christopher Glynn Parker of one of the most important pre-Civil War designers and writers in America.
- http://www.fredericklawolmsted.com/ajdowning.htm

Downing, Andrew Jackson (1815-1852)
- A brief article and web links from Noted Relations on this American horticulturalist, nurseryman, architect and landscape architect.
- http://freepages.history.rootsweb.com/~dav4is/people/DOWN478.htm