I turned the knob weakly and entered, almost on tiptoe. There at the side of a long table sat the same lank individual who spoke at the Cooper Union four years before. The pallor of his face and the prominence of the cheek bones seemed even more striking in contrast with the full beard than when he was clean shaven. But his hair was as sadly disturbed and his clothing had the same lack of style and fitness. An old gray shawl had fallen across one corner of the table, where also lay numerous rolls of papers. The President did not look up when I stepped in and hesitatingly sat down in the chair nearest the door. That close application to the task before him was a characteristic of Lincoln which has not been emphasized by his biographers as it could and should have been. To quote his own words, whenever he read a book he "exhausted it." It seems to be the one great trait of character which lifted him above the common clay from which he came. Lincoln had no inheritance worth recording. He once wrote to his partner that what little talent, money, and learning he had was "purloined or picked up." Surely, never among the surprises which one finds in the history of this nation is there one more unaccountable than the career of Abraham Lincoln. How he first formed the habit, or where he adopted his method of mental concentration, has not been revealed. The ability to focus one's whole mind on a single idea is not such an unattainable achievement. Perhaps it has no connection with genius in the true sense, but it serves to concentrate all the rays of mental light and power until they penetrate the hardest substances and ignite into explosion the latent power hitherto unguessed. There seems to be no other great quality in Lincoln's mentality, but that one may account for all in him that was above the normal. He could manage flatboats, split rails, endure fatigue, tell homely stories for illustration, and wait with unshakable patience, but his greatest achievement was in the power he gained to think hard and long with his mind immovably concentrated upon a difficult problem. That morning while I sat trembling by the door, the President read on with undisturbed attention the manuscript before him, occasionally making notes on the margin of the paper. He did not lift his eyes or move in his seat, and it was not until he had read carefully the last sentence, had scribbled his name or initials at the bottom of the last page, and had tied the paper carefully with a string, that he looked up at his visitor. Then a smile came over the worn face, and as he pulled himself into his spring-backed chair he called out, cheerfully: "Come over to the table, young man. Glad to see you. But remember that I am a very busy man and have no time to spare; so tell me in the fewest words what it is you want."