Comment on meeting Harriet Beecher Stowe, author of Uncle Tom's Cabin, according to Charles Edward Stowe, Lyman Beecher Stowe, "How Mrs. Stowe wrote 'Uncle Tom's Cabin'", McClure's magazine 36:621 http://books.google.com/books?id=biAAAAAAYAAJ&pg=PA621&dq=%22little+woman+who+wrote+the+book+that+made+this+great+war%22 (April 1911), with a footnote stating: "Mr. Charles Edward Stowe, one of the authors of this article, accompanied his mother on this visit to Lincoln, and remembers the occasion distinctly."
Annie Fields, "Days with Mrs. Stowe", Atlantic Monthly 7:148 http://books.google.com/books?id=8F0CAAAAIAAJ&pg=PA148&dq=%22Is+this+the+little+woman+who+made+the+great+war%22 (August 1896)
Posthumous attributions
Variant: Her daughter was told that when the President heard her name he seized her hand, saying, "Is this the little woman who made the great war?"
Variant: So you are the little woman who caused this great war!