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UNITED STATES - CIRCA 1863: Mrs. Abraham Lincoln (Photo by Buyenlarge/Getty Images)

UNITED STATES - CIRCA 1863:  Mrs. Abraham Lincoln  (Photo by Buyenlarge/Getty Images)

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circa 1863: Mary Todd Lincoln (1818 - 1882), wife of American president Abraham Lincoln and daughter of a Kentucky slaveholder. She is wearing mourning dress, probably following the death of her son Willie in 1862. (Photo by Mathew Brady/MPI/Getty Images)

circa 1863:  Mary Todd Lincoln (1818 - 1882), wife of American president Abraham Lincoln and daughter of a Kentucky slaveholder. She is wearing mourning dress, probably following the death of her son Willie in 1862.  (Photo by Mathew Brady/MPI/Getty Images)

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Portrait of Mary Todd Lincoln

Portrait of Mary Todd Lincoln

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1864: The Lincoln family, (from right), President Abraham Lincoln, his sons Thomas and Robert and his wife, Mary. Original Artwork: Printed by Currier & Ives. (Photo by MPI/Getty Images)

1864:  The Lincoln family, (from right), President Abraham Lincoln, his sons Thomas and Robert and his wife, Mary.  Original Artwork: Printed by Currier & Ives.  (Photo by MPI/Getty Images)

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14th April 1865: The assassination of Abraham Lincoln by John Wilkes Booth at Ford's Theatre, Washington DC. Abraham Lincoln (1809 - 1865), was the 16th President of the United States of America (1861 - 1865). Original Artwork: Engraving by Currier & Ives (Photo by MPI/Getty Images)

14th April 1865:  The assassination of Abraham Lincoln by John Wilkes Booth at Ford's Theatre, Washington DC. Abraham Lincoln (1809 - 1865), was the 16th President of the United States of America (1861 - 1865). Original Artwork: Engraving by Currier & Ives  (Photo by MPI/Getty Images)