A couple of biographical links;
http://www.uplook.org/1994/02/theodosia-lady-powerscourt/
http://www.believersmagazine.com/bm.php?i=20081211
and her Letters;
http://www.stempublishing.com/authors/various/POWERSCO.html
From "The Freeman's Journal", 24 Feb 1830, p. 4),
From, The Standard, London, 12 Jan 1837, p. 2: