The principal fields are in the " southern tier," from Wayne to Allen county, including Barren county; farther east, Knox county, and Floyd and Knott counties; to the north-east the Ragland field in Bath and Rowan counties on the Licking river.
It was undertaken in defence of Dr Christopher Potter, provost of Queen's College in Oxford, who had for some time been carrying on a controversy with a Jesuit known as Edward Knott, but whose real name was Matthias Wilson.
Potter had replied in 1633 to Knott's Charity Mistaken (1630), and Knott retaliated with Mercy and Truth.
Laud, now archbishop of Canterbury, was not a little solicitous about Chillingworth's reply to Knott, and at his request, as "the young man had given cause why a more watchful eye should be held over him and his writings," it was examined by the vicechancellor of Oxford and two professors of divinity, and published with their approbation in 1637, with the title The Religion of Protestants a Safe Way to Salvation.
Melber, Ueber die Quellen and Werth der Strategemensammlung Polycins (1885); Knott, De fide et fontibus Polyaeni (1883), who largely reduces the number of the authorities consulted by Polyaenus.