Augur was one of the Army officers who were present at the Petersen House where the mortally wounded President Abraham Lincoln was taken after he was shot by John Wilkes Booth. At Secretary of War Edwin Stanton's request, Augur went into the street and called out for a competent phonographer who knew shorthand well enough to take verbatim notes for Stanton as he interviewed witnesses to that night's tragic event. Corporal James R. Tanner answered Augur's call and volunteered to transcribe the witness accounts for Secretary Stanton. Augur escorted Corporal Tanner into the Petersen House where he introduced Tanner to Secretary Stanton and Chief Justice David K. Cartter, who was also present for the depositions. Augur then outlined to Tanner what his duties would be for the rest of the night.