Answer by taking a quote from the following article:

Mary Elizabeth Jenkins was born to Archibald and Elizabeth Anne (nee Webster) Jenkins on a tobacco plantation near the southern Maryland town of Waterloo (now known as Clinton). Sources differ as to whether she was born in 1820 or 1823. There is uncertainty as to the month as well, but most sources say May.

Each body was inspected by a physician to ensure that death had occurred. The bodies of the executed were allowed to hang for about 30 minutes and soldiers began to cut them down at 1:53 P.M. A corporal raced to the top of the gallows and cut down Atzerodt's body, which fell to the ground with a thud. He was reprimanded, and the other bodies were cut down more gently. Herold's body was next, followed by Powell's. Surratt's body was cut down at 1:58 P.M. As Surratt's body was cut loose, her head fell forward. A soldier joked, "She makes a good bow" and was rebuked by an officer for his poor use of humor.  Upon examination, the military surgeons determined that no one's neck had been broken by the fall. The manacles and cloth bindings were removed but not the white execution masks, and the bodies were placed into the pine coffins. The name of each person was written on a piece of paper by acting Assistant Adjutant R. A. Watts, and inserted in a glass vial, which was placed into the coffin. The coffins were buried against the prison wall in shallow graves, just a few feet from the gallows. A white picket fence marked the burial site. The night that she died, a mob attacked the Surratt boarding house and began stripping it of souvenirs until the police stopped them.  Anna Surratt unsuccessfully asked for her mother's body for four years. In 1867, the War Department decided to tear down the portion of the Washington Arsenal where the bodies of Surratt and the other executed conspirators lay. On October 1, 1867, the coffins were disinterred and reburied in Warehouse No. 1 at the Arsenal, with a wooden marker placed at the head of each burial vault. Booth's body lay alongside them. In February 1869, Edwin Booth asked Johnson for the body of his brother. Johnson agreed to turn the body over to the Booth family, and on February 8 Surratt's body was turned over to the Surratt family. She was buried in Mount Olivet Cemetery in Washington, D.C., on February 9, 1869. Lloyd is buried 100 yards (91 m) from her grave in the same cemetery.

who is johnson?