Thus, little by little, ever softened by some excuse or some hope, the bitter truth grew plain: Grace was failing, fading, threatening to vanish. He wrote as often as he could, and sought with all his skill to cheer, sustain, and reconcile her to life. At first she wrote to him not infrequently, but her letters grew further and further apart, and at last she wrote, in the early spring of '65. "I wish I could see you, Alford; but I know it is impossible. You are strong, you are doing much to end this awful war, and it's your duty to remain at your post. You must not sully your perfect image in my mind, or add to my unhappiness by leaving the service now for my sake. I have learned the one bitter lesson of the times. No matter how much _personal_ agony, physical or mental, is involved, the war must go on; and each one must keep his place in the ranks till he falls or is disabled. I have fallen. I am disabled. My wound will not close, and drop by drop life and strength are ebbing. I know I disappoint you, my true, true friend; but I cannot help it. Do not reproach me. Do not blame me too harshly. Think me weak, as I truly am. Indeed, when I am gone your chances will be far better. It costs me a great effort to write this. There is a weight on my hand and brain as well as on my heart. Hereafter I will send my messages through dear, kind Mrs. Mayburn, who has been a mother to me in all my sorrow. Do not fear: I will wait till you can come with honor; for I must see you once more." For a long time after receiving this letter a despair fell on Graham. He was so mechanical in the performance of his duties that his associates wondered at him, and he grew more gaunt and haggard than ever. Then in sharp reaction came a feverish eagerness to see the war ended. Indeed all saw that the end was near, and none, probably, more clearly than the gallant and indomitable Lee himself. At last the Confederate army was outflanked, the lines around Petersburg were broken through, and the final pursuit began. It was noted that Graham fought and charged with an almost tiger-like fierceness; and for once his men said with reason that he had no mercy on them. He was almost counting the hours until the time when he could sheathe his sword and say with honor, "I resign." One morning they struck a large force of the enemy, and he led a headlong charge. For a time the fortunes of the battle wavered, for the Confederates fought with the courage of desperation. Graham on his powerful horse soon became a conspicuous object, and all gave way before him as if he were a messenger of death, at the same time wondering at his invulnerability.