Original sentence: His presence became known to the authorities, and the diffusion of the challenge he threw down in the form of a declaration, known as the "Challenge to the Privy Council" to his allies and as "Campion's Brag" to his enemies (by which name it is most commonly known today), made his position more difficult
Edited sentence: His presence became known to the authorities, and the diffusion of the challenge he threw down in the form of a declaration, "Campion's Brag", made his position more difficult (a challenge to the authorities which Jesuits have read ever since with unblushing pride)