This paper is in four parts. The first sets out the debate between those who wished England to have only a professional army, and those who sought to supplement it with a citizen militia. This debate is crucial for understanding The History of the Proceedings in the Case of Margaret, Commonly Called Peg, Only Lawful Sister to John Bull, Esq. This political satire (commonly known as Sister Peg) is about the successful struggle to re-establish the militia in England in 1757, (...) and the unsuccessful attempt to extend the measure to Scotland. Adam Ferguson was in favour of Scotland having a militia, whereas some have claimed that Hume was against it. It is argued that Hume supported the measure. In the second part Sister Peg is briefly compared to Dr John Arbuthnot’s The History of John Bull, of which it is an imitation and sequel. In the third part the issue of the disputed authorship of Sister Peg is considered at length and Hume’s claim to have written it is compared to the Rev. Alexander Carlyle’s account that Ferguson alone wrote the work. Which of the two accounts is reliable? Richard B. Sher, in an article in this journal, assumes that Carlyle’s account is reliable, and takes issue with my arguments for reattributing the satire to Hume. It is argued that none of his arguments is successful, and that simply assuming the reliability of Carlyle’s account begs the question. In the fourth part some emendations made by Ferguson in his copy of Sister Peg are set out so that readers may see for themselves that they are almost certainly non-authorial. (shrink)