Prefixed to each volume will be found a dedication to some of the numerous patrons of the Bollandists, followed by an account of the life and labours of any of their Company who had died since their last publication. Thus, opening the first volume for March, we find, in order, a dedication to the reigning Pope, Clement IX; the life of Bollandus; an alphabetical index of all the Saints celebrated during the first eight days of March; a chronological list of Saints discussed under the head of March 1; the lives of Saints, including the Greek ones discovered by Henschenius during his Italian tour, ranged under their various natal days, followed by five indexes as already described. But, the reader may well ask, is there no general index, no handy means of steering one's way through this vast mass of erudition, without consulting each one of those fifty or sixty volumes? Without such an apparatus, indeed, this giant undertaking would be largely in vain; but here again the forethought of Bollandus from the very outset of his enterprise made provision for a general index, which was at last published at Paris, in 1875. We possess also in Potthast's "Bibliotheca Historica Medii Aevi," a most valuable guide through the mazes of the "Acta Sanctorum," while for a very complete analysis of every volume, joined with a lucid explanation of any changes in arrangement, we may consult De Backer's "Bibliothèque des Ecrivains de la Compagnie de Jésus," t. v., under the name "Bollandus." But some may say, what is the use of consulting these volumes? Are they not simply gigantic monuments of misplaced and misapplied human industry, gathering up every wretched nursery tale and village superstition, and transmitting them to future ages? Such certainly has been the verdict of some who knew only the backs of the books, or who at farthest had opened by chance upon some passage where--true to their rule which compelled them to print their manuscripts as they found them--the Bollandists have recorded the legendary stories of the Middle Ages. Yet even for an age which searches diligently, as after hid treasure, for the old folk-lore, the nursery rhymes, the popular songs and legends of Scandinavia, Germany, and Greece, the legends of mediæval Christendom might surely prove interesting. But I regard the "Acta Sanctorum" as specially valuable for mediæval history, secular as well as ecclesiastical, simply because the authors--having had unrivalled opportunities of obtaining or copying documents--printed their authorities as they found them; and thus preserves for us a mine of historical material which otherwise would have perished in the French Revolution and its subsequent wars. Yet it is very strange how little this mine has been worked. We must suppose indeed that it was simply due to the want of the helps enumerated above--all of which have come into existence within the last twenty-five years--that neither of our own