and well manicured (unlike those of a common laborer). Mary denied knowing him. She would later claim that her extremely poor eyesight and the darkness of the room prevented her from recognizing Powell. Powell stood under a bright lamp just five feet from her when she made her denial. Taken into custody, Powell was discovered to have a box of pistol cartridges, a compass, hair pomade, a brush and comb, two fine handkerchiefs, and a copy of his oath of allegiance (signed "L. Paine") in his pockets. These were not the possessions of a menial laborer. Although he claimed he was a poor man who barely earned a dollar a day for ditch-digging, Powell's wallet contained $25. About 3:00 a.m. on April 18, William Bell identified Powell as the man who assaulted Seward. Powell was formally arrested, and imprisoned aboard the , a Union monitor then at anchor in the Anacostia River at the Washington Navy Yard. A second identification was made around mid-morning on April 18 when Augustus Seward visited the Saugus and positively identified Powell as the man who attacked him and his father. Trial The federal government arrested a great many people for their role in the Lincoln assassination. Arrests included John T. Ford, owner of Ford's Theatre; Ford's brothers, James and Harry Clay Ford; John "Peanuts" Burroughs, the African American boy who unwittingly held Booth's horse in the alley behind Ford's Theatre; Mary Surratt's brother, John Zadoc "Zad" Jenkins; Surratt's boarder, 15-year-old Honora Fitzpatrick; and many others. Some, like Judson Jarboe, had merely seen one of the key conspirators walk by. All were released, although many were incarcerated for up to 40 days or more. The most important prisoners were kept aboard monitors, to prevent escape as well as any effort to free them. Along with Powell on the Saugus were Michael O'Laughlen, Samuel Arnold, Edman Spangler, and George Atzerodt's cousin, Hartmann Richter – who had harbored Atzerodt for four days. Aboard the were David Herold, George Atzerodt—he was later moved to the Saugus—and the body of John Wilkes Booth. Samuel Mudd and Mary Surratt were held at the Old Capitol Prison – now the site of the United States Supreme Court Building. Confinement Reporters were denied access to the prisoners, but photographer Alexander Gardner received clearance. On April 27, Gardner began taking photographs of those who were caught up in the government's dragnet. One by