In undertaking to refute and expose the greatest mass of falsehood and calumny ever issued against the social and religious principles of our Catholic fellow-men, we may be condemned for our temerity, but we think we shall stand excused, when the active endeavours of bigotry, to give circulation to what is called Fox's Book of Martyrs, are taken into consideration. With some it has been a matter of surprise that such an exposition has not been undertaken before; but when the obstacles which have so long existed to prevent Catholic writers from vindicating their religious doctrines and social maxims are known, and the misfortune is that they are not known to the people of this country generally, that surprise will entirely vanish. - Introductory remarks.