Hetty Robinson produced a will page giving her all of her aunt's $2 million, and a Harvard mathematician testified the signature was traced

Hetty Robinson was the niece and sole heir-at-law of Sylvia Ann Howland. Howland died on 2 July 1865 with an estate of about $2 million. Her will of 1 September 1863 and a codicil of 18 November 1864 left about half to other legatees and put the rest in trust. Hetty would receive only the income for life, and the principal would then go to others. Hetty produced an earlier will, signed 11 January 1862, that left her everything, with a second page that revoked any later will. She said she and her aunt had agreed to make wills in each other's favour. The executor, Thomas Mandell, said the second page was a forgery. Experts agreed its signature was traced from the original. The Harvard mathematician Benjamin Peirce testified that an exact match of all 30 downstrokes would occur by chance once in "two thousand six hundred and sixty-six millions of millions of millions of times." In October 1868 Justice Nathan Clifford dismissed her suit without ruling on the forgery. The law barred her from testifying about her dealings with her aunt, and without that testimony no contract was proved. Hetty later married Edward Green and became known as the "Witch of Wall Street." She died in 1916 and divided her fortune between her son Ned and her daughter Sylvia.