Who Said This?

[RJNorton]

No googling, please.

What is the name of the person who noted the following about President Lincoln?

"He was not a born king of men but a child of the common people, who made himself a great persuader, therefore a leader, by dint of firm resolve, patient effort, and dogged perseverance. He slowly won his way to eminence and fame by doing the work that lay next to him – doing it with all his growing might – doing it as well as he could, and learning by his failure, when failure was encountered, how to do it better."