Perhaps the scope of this book will be best understood if I explain that the subject attracted my attention, not as an important crisis in the history of Ireland, but, in the first place, as an appendix to the history of the Roman Empire, illustrating the emanations of its influence beyond its own frontiers; and, in the second place, as a notable episode in the series of conversions which spread over northern Europe the religion which prevails to-day. Studying the work of the Slavonic apostles, Cyril and Methodius, I was led to compare them with other European missionaries, Wulfilas, for instance, and Augustine, Boniface, and Otto of Bamberg. When I came to Patrick, I found it impossible to gain any clear conception of the man and his work. The subject was wrapt in obscurity, and this obscurity was encircled by an atmosphere of controversy and conjecture. Doubts of the very existence of St. Patrick had been entertained, and other views almost amounted to the thesis that if he did exist, he was not himself, but a namesake. It was at once evident that the material had never been critically sifted, and that it would be necessary to begin at the beginning, almost as if nothing had been done, in a field where much had been written.
This may seem unfair to the work of Todd, which in learning and critical acumen stands out pre-eminent from the mass of historical literature which has gathered round St. Patrick. And I should like unreservedly to acknowledge that I found it an excellent introduction to the subject. But it left me doubtful about every fact connected with Patrick’s life. The radical vice of the book is that the indispensable substructure is lacking. The preliminary task of criticising the sources methodically had never been performed. Todd showed his scholarship and historical insight in dealing with this particular passage or that particular statement, but such sporadic criticism was no substitute for methodical Quellenkritik. Hence his results might be right or wrong, but they could not be convincing.
It is a minor defect in Todd’s St. Patrick that he is not impartial. By this I mean that he wrote with an unmistakable ecclesiastical bias. It is not implied that he would have ever stooped to a misrepresentation of the evidence for the purpose of proving a particular thesis. No reader would accuse him of that. But it is clear that he was anxious to establish a particular thesis. He does not conceal that the conclusions to which the evidence, as he interpreted it, conducted him were conclusions which he wished to reach. In other words, he approached a historical problem, with a distinct preference for one solution rather than another; and this preference was due to an interest totally irrelevant to mere historical truth. The business of a historian is to ascertain facts. There is something essentially absurd in his wishing that any alleged fact should turn out to be true or should turn out to be false. So far as he entertains a wish of the kind, his attitude is not critical.