Author talk:Clarence Frederick Underwood

sources [Note: while americanartarchives refer to the artist as female, others categorise as male (or don't categorise at all)]
 * http://www.askart.com/artist/Clarence_Frederick_Underwood/100245/Clarence_Frederick_Underwood.aspx
 * http://artcontrarian.blogspot.in/2014/08/clarence-f-underwood-prolific-then.html
 * http://www.americanartarchives.com/underwood.htm
 * http://maherartgallery.blogspot.in/2012/03/clarence-f-underwood-1871-1929-american.html