The question we wish to raise is simply this: “Does the address before us admit that the human mind in the pursuit of truth should be restrained by the authoritative definitions of the Catholic Church, or does it rather exclude this restraint?” Now, in the first place, it is to be remembered that this restriction of intellectual freedom is denied by all Protestants in this country, and maintained by all Catholics. When a lecturer, then, addressing a mixed audience, in a written discourse, tells them that “all men have a right to exercise their intellectual faculties _unrestrained_”, do not the circumstances of the case fix upon his words a Protestant signification? Will not his hearers naturally say that he has chosen the Protestant side of the controversy, and not the Catholic? Again, according to the Protestant doctrine, each one is at liberty to construct a system of religious belief for himself: according to the Catholic doctrine, every one should accept the tenets of his faith on the authority of the Church. Now we are told in the address, that all men have “_a right to determine for themselves_ what is truth and what is falsehood”. Has this phraseology a Catholic or a Protestant complexion? Lastly, the lecturer exhorts his hearers to go themselves to the pages of Milton, there to learn the doctrine of intellectual freedom. It will, therefore, naturally be supposed, that the doctrine is defended by the lecturer in the same sense in which it is defended by the poet. Now Milton denied again and again, not in his writings only, but also by his acts, that the Church has any right to interfere with the speculations of the human mind. It is evident, therefore, that the language of Mr. Justice Keogh, whether considered in itself, or understood by the light of the context, is incompatible with the principles of the Catholic Religion. Freedom of thought is not enough: freedom of speech is also an essential dogma of the new philosophy. We are assured that all men have a right “to circulate their thoughts from one to another, from land to land, from tribe to tribe, from nation to nation, free as ‘the winds that from four quarters blow’; to raise their thoughts, and to pour forth their words above the level of vulgar superstition, unrestricted by any illiberal or illiterate licenser”. Accordingly, amongst the various prose works of Milton, there is one which our lecturer selects for especial commendation. It is entitled: _Areopagitica, a Speech for the Liberty of Unlicensed Printing_. This little tract is distinguished, no doubt, for its learning, wit, and eloquence; but these high qualities are devoted to the defence of opinions which we cannot accept. The book and its principles are thus introduced to his audience by Mr. Justice Keogh: