Since I know nothing of this actor I cannot think of any clues. So here is what I came across. The actor's name was Frank Mordaunt. The quote is in a footnote in Inside Lincoln's White House: The Complete Civil War Diary of John Hay edited by Michael Burlingame and John R. Turner Ettlinger. The original source is the June 1905 Chicago Inter-Ocean.
I have his original wedding license and it is spelled Payne. This is a picture of him in later years with his son's and one step son. He is second from the left.
After Abraham Lincoln's assassination two actors claimed they had previously rented the room where the president died. Both claimed John Wilkes Booth has visited them and rested upon the same bed on which Lincoln passed away. One of these actors was John Mathews. Who was the other?
John Surratt said that in his final trip to Richmond Judah Benjamin gave his some dispatches to take to Montreal. The dispatches were hidden in a book Surratt carried with him. What was the name of the book?