A Reply to Cardinal Manning's Recently Acknowledged Essay Entitled "Dr. Nicholson's Accusation of the Archbishop of Westminster" [originally Published Under the Pseudonym Catholicus and Referring to the Correspondence on the Archbishop's Sermon The Devotion of the Sacred Heart.]

This polemical work was published during the height of the 19th-century theological debates surrounding the Catholic Church in England. John Aldwell Nicholson, an Anglican clergyman, authored the piece as part of a sharp intellectual confrontation with Henry Edward Manning, the Archbishop of Westminster. The pamphlet was designed to address specific grievances Nicholson held regarding Manning's interpretation and defense of the devotion to the Sacred Heart, aiming to publicly challenge the Archbishop's ecclesiastical authority and rhetoric.

The publication functions as a significant record of the period's intense sectarian discourse, reflecting the frictions between high-church Anglicanism and the Roman Catholic hierarchy. Nicholson employed the pseudonym Catholicus to frame his arguments within the ecclesiastical vocabulary of the day, hoping to influence public perception of the Archbishop's sermon. It was received as a provocative contribution to the volatile pamphlet wars of the era, illustrating the deep-seated disputes over liturgy and dogma that defined Victorian religious life.