Where and what was Abraham Lincoln doing when he was assassinated ?
According to a story circulated in the early 1900s , Henderson met with President Abraham Lincoln on April 14 , 1865 shortly before Lincoln left for Ford 's Theatre where he was assassinated that night , and successfully procured a pardon for Missouri resident George S. E. Vaughn who had been convicted of spying and sentenced to death , becoming Lincoln 's last official act as President .