ALS signed “Robert T. Lincoln,” one page both sides, 4.5 x 7, personal letterhead, February 11, 1900. Complimentary letter to muckraking author Ida Tarbell, who had just published The Life of Abraham Lincoln. In part: “Very many thanks for your two volumes which are brought out very finely. It seemed to me at first that the field had been too many times gleaned to hope for much from the work you were undertaking and I must confirm my astonishment & pleasure upon the extent of your untiring researches. I consider it an indispensable adjunct to the work of Nicolay & Hay.” In fine condition. John Nicolay and John Hay had published the 10-volume Abraham Lincoln, a History a decade previously. RRAuction COA.