Anthony Babington was an English gentleman convicted of plotting the assassination of Elizabeth I of England and conspiring with the imprisoned Mary, Queen of Scots, for which he was hanged, drawn and quartered. The "Babington Plot" and Mary's involvement in it were the basis of the treason charges against her which led to her execution. He was a member of the Babington family.
Portrait of young gentleman said to be Anthony Babington
Thomas Phelippes' forged cipher postscript to Mary, Queen of Scots' letter to Anthony Babington
The Babington Plot was a plan in 1586 to assassinate Queen Elizabeth I, a Protestant, and put Mary, Queen of Scots, her Catholic cousin, on the English throne. It led to Mary's execution, a result of a letter sent by Mary in which she consented to the assassination of Elizabeth.
Walsingham's "Decypherer" forged this cipher postscript to Mary's letter to Babington. It asks Babington to use the – broken – cipher to tell her the names of the conspirators.
Mary in captivity, c. 1578
Sir Francis Walsingham
The cipher code of Mary, Queen of Scots