who was captain beckwith
Captain Samuel H. Beckwith (1840-6 December 1916) was telegraph and cipher officer to Ulysses S Grant. He was nicknamed Grant's shadow by other staff officers. Beckwith was the first to transmit news of John Wilkes Booth 's whereabouts after Lincoln's assassination, leading to his capture. Beckwith was also present as Grant's telegraph officer on Abraham Lincoln 's visits.