Who is this person?

[Rob Wick]

Things appear to be moving slowly here, so I'll give two clues.

Ida Tarbell said in a personal note that "One thing that interested me about [blank's] life is that he has reproduced a number of paintings of the period--pretty dreadful most of them--not the kind of thing you would want hanging about. [His] attitude towards them is very interesting. The truth is anything that concerns directly or indirectly with Lincoln while he was living is a matter of passionate importance to him. I have never seen quite such an interesting worshipper as [?]."

Second. He didn't begin his Lincoln studies until the age of 53 when he was asked to give a speech with only a few days notice. From that point to his death at 69, he was very prolific.

Best
Rob