Letter from Mary Todd Lincoln, newly discovered, shows rare side of former first lady, says expert

A newly discovered letter written by former first lady Mary Todd Lincoln shows a side of her that is rarely seen, an author and historical document expert told FOX Business.

The letter is addressed to George Harrington; his descendants reportedly found it in their family archives. At the time, Harrington was assistant secretary of the Treasury. 

In the letter, Mrs. Lincoln was trying to get a Treasury Department job for a woman, which Nathan Raab told FOX Business was very unusual for a woman during that time period.