Who Said This?

[Rob Wick]

No Googling, please.

I put this question here because it isn't related to either Tarbell or Sandburg, so that should serve as the first clue as to it isn't.

Who said this?

"Those of us who write books about Lincoln have to bear patiently with our friends who inquire of us in monotonous and wearisome incredulity, "What, another book about Lincoln? What more can be left to say? Are you not simply threshing the old straw over again?" Some of us emphatically desire that we shall not be understood as doing anything of the kind. Nor are we mere gleaners in a field that has often been reaped and harvested. We have discovered new areas for cultivation, and we believe that in some particulars we are reaping more abundant harvests than any of our predecessors. And we know that we have not reached the limits."

I have a feeling that this should be fairly easy.

Best
Rob