After John Wilkes Booth shot Abraham Lincoln, twenty-three year old Army Surgeon Charles Leale was the first doctor to the treat the slain President. In 1909, Leale wrote his recollection of the night in an article titled Lincoln's Last Hours.
From: Harper's weekly : a journal of civilization. Vol. LIII, no. 2721, February 13, 1909
In May of 1865, eight people were tried for charges of conspiring to assassinate Abraham Lincoln. John Wilkes Booth was dead, and the U.S. Government wanted to bring the rest to justice. This book details the military tribunal in the trial against the Lincoln assassination conspirators. It includes the testimony of the witnesses and the conspirators.
In 1963, the National Park Service published Restoration of Ford's Theatre, a book that delves into the history of Ford's Theatre and explains in great detail the construction and layout of the theatre. The Restoration of Ford's Theatre is the best source of architectural data on the theatre, information on the multiple transformations the building took, and the role it played in Abraham Lincoln's assassination.
An article published in the January, 1890 Century magazine by Prentiss Ingraham, about the manhunt and death of John Wilkes Booth. Ingraham was an acquaintance of Confederate Officer, Major M.B. Ruggles and Lieutenant Bainbridge, men who helped Booth and Herold on their escape to the South. Ingraham was also a friend of Captain Doherty, the man in charge of the 16th New York Cavalry when they captured and shot Booth. This article is Ingraham's memory of discussions with these three men.
Published in July 1865, the same month four of the lincoln assassination conspirators were hanged, Attorney General James Speed published his Opinion on the Constitutional Power of the Military to Try and Execute the Assassins of the President. It was a 16 page defense and justification for using a military tribunal to try the conspirators, instead of a public civil trial.
In 1867, cholera and yellow fever ran infected dozens of army locations across the United States. Included in this was Fort Jefferson prison, the location where Dr. Samuel Mudd, Samuel Arnold, Ned Spangler, and Michael O"Laughlen were imprisoned. The report was published as a record of the epidemic and to prevent further cases in the coming years by learning from it. Michael O'Laughlen lost his life to yellow fever that year. Dr. Mudd assisted with the treatment of the soldiers and prisoners. This is referenced on page 154.
On December 1870, John Surratt gave a lecture in Rockville, Maryland, discussing his part on the plot to kidnap President Abraham Lincoln and the fact that he had no involvement in the assassination. This is the transcript of that lecture as posted in Washington's Evening Star newspaper on December 7, 1870.