Who is this person?

[David Lockmiller]

I recognized that face right away. It's Fanny McCullough, who's family was close to Lincoln. Lincoln stayed with the McCullough family in Bloomington when he was riding the circuit as a lawyer. Lincoln wrote a heartfelt condolence letter to her in 1862, after her father, Lt. Col William McCullough had been killed in battle. It was a precursor to the later more famous condolence letter to Mrs Lydia Bixby.

It should be noted:

"The Bixby letter is beautiful indeed, but it was written by John Hay, not Lincoln."

Abraham Lincoln: A Life, Volume Two, page 737, by Professor Burlingame.