The pamphlet asks three questions, which highlight the purpose of the document (from page 9 of the 1743 re-print): The author(s) of the pamphlet highlight arguments and statements from Aristotle, Plato, Plutarch, Solon's law, Xenophon, Cicero, and other historical writings, as well as contemporaries from the 17th century (e.g., Hugo Grotius) to make the case that to murder a tyrant is (and has forever been) an honourable act.
To your Highness justly belongs the Honour of dying for the people, and it cannot choose but be unspeakable consolation to you in the last moments of your life to consider with how much benefit to the world you are like to leave it.
The individuals generally attributed with authorship are (in order): Colonel Silius Titus,[1] Edward Sexby[1] or William Allen.
Additionally, Charles II of England awarded Titus the title of Gentleman of the Bedchamber for his service in authoring the work.
[4][5] Edward Sexby had returned to England to try where Miles Sindercombe had failed in exacting the call for assassination found in Killing No Murder.
The trio (Allen, Sexby and Sheppard) had agitated Cromwell in the past by expressing their concerns about the Army's attitude toward Parliament.