Aware that the Gallicans among the French hierarchy were, like Darboy, not averse to Pusey's overtures, Newman wrote to Mgr. Dupanloup, warning him, and through him others, of the dangers of encouraging what he thought was a 'vain hope'. Writing in Latin on 25 January 1866, he tried to give the Frenchman some idea of the context within which Pusey should be viewed. The letter gives us one of the best, and most sustained, accounts of Newman's views on the Anglo-Catholic movement within the Church of England.

Describing Pusey as a representative of: 'a more weighty circle of men who have been cast out from the fullness of Christian life', Newman warned Dupanloup that men like Darboy had encouraged the delusion that Anglican orders were somehow valid, which was not so:

Since the Anglican Church does not have the strength of truth and sanctity nor apostolicity freely to effect so great a thing, neither does it wish to undertake such a task.

Pusey was merely a representative of one of 'three factions or parties', whom Newman designated under the headings: 'catholics, puritans and liberals'. For the French hierarchy to encourage Pusey ran the risk that the former might:

threaten their Bishops and the other two factions opposed to them that they are suddenly about to depart from Anglicanism to the Catholic Church unless they are granted leave to preach Catholic dogma and celebrate catholic rites in their Anglican Communion

which would, he added, simply delay their departure across the Tiber. Truth, Newman thought, was not to be furthered by any form of compromise with untruth. The Anglican Church was not, as he had once thought, part of the Catholic Church, and to encourage Pusey and others in the belief it was so was, he averred, no service to anyone.