The poignant story of Abraham Lincoln's assassination on April 14 1865 is familiar to us all. Lincoln had seen the surrender of the Northern Virginia Army of Lee to Grant at Appomatox and surely knew that the entire Confederacy would surrender shortly (which it did by Joseph Johnston to Sherman two weeks later) - but Lincoln would never live to actually see it.
David Davis, who signed the certificate, was one of Lincoln's closest friends and was appointed to the Supreme Court by Lincoln. Davis accompanied Lincoln's body back to Illinois and also acted as administrator of Lincoln's estate. (Note that Lincoln's estate was worth $85,000).