When the Life was finally complete Mr. Lincoln wrote me: “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 confess my astonishment and pleasure upon the result of your untiring research. I consider it an indispensable adjunct to the work of Nicolay and Hay.” Mr. Nicolay, however, never agreed. If Robert Lincoln was always friendly he threw me once into the greatest panic I suffered in the course of my Lincoln work, though this was long after the Life was published. I had gone to him to ask if he would arrange for me to consult the collection of Presidential papers. “Impossible,” he said. “They are in the safety vault of my bank. I won’t allow anybody to see them. There is nothing of my father’s there, that is of value—Nicolay and Hay have published everything; but there are many letters _to_ him which if published now would pain, possibly discredit able and useful men still living. Bitter things are written when men are trying to guide a country through a war, particularly a Civil War. I fear misuse of those papers so much that I am thinking of destroying them. Besides, somebody is always worrying me about them, just as you are, and I must be ungenerous. I think I will burn them.” I was scared; I feared he would do it, but Herbert Putnam, the head of the Congressional Library, had already seen to that. He did not burn them; the Library got them finally, but with the condition that they were not to be opened until twenty-one years after Robert Lincoln’s death. He died in 1926. The papers will not be available to students until 1947, which probably lets me out! The early portrait set the key for the series and, as it turned out, a much higher key than I had believed possible. I found that court records did yield unpublished documents, that every now and then I ran on a man or woman who said more or less casually, “Why, we have a letter of Lincoln’s written to father in ——. Copy it if you wish.” Occasionally I found a speech not in the “Complete Works.” By the time the work was put into book form in 1899 I had an appendix of three hundred unpublished speeches and letters. This did not mean that none of them had ever been in print. Many of them had appeared in newspapers or historical magazines. “Unpublished” meant uncollected. On the whole this collection stood the scrutiny of experts very well, though I think I was swindled in the case of at least one document, a forgery by a man recommended to me by an honest scholar who had used the man frequently for years.