Heribert Resweidus, of Utrecht, was a learned Jesuit father, born in 1563, who died 1629. In 1607 he published the "Fasti sanctorum quorum vitae manuscriptae in Belgio," a book containing the plan of a vast work on the lives of all the Saints, which he desired to undertake. In 1613 he published "Notes on the old Roman Martyrology," which he was the first to discover. In 1615 he brought out the "Lives of the Hermits," and in 1619 another work on the "Eremites of Palestine and Egypt." In 1626 he published the "Lives of the Virgin Saints." He died before the great work for which he had collected, and to which he had devoted his time and thoughts, was begun. But the project was not allowed to drop. It was taken up by John Bollandus, another Jesuit; with him were associated two other fathers of the same order, Henschenius and Papebrock, and in 1643 appeared the January volumes, two in number. In 1648 the three volumes of the February Saints issued from the press. Bollandus died in 1665, and the March volumes, three in number, edited by Henschenius and Papebrock, appeared in 1668. As the work proceeded, material came in in abundance, and the work grew under their hands. May was represented by seven volumes; so also June, July, and August. The compilation is not yet complete. At present, this huge work consists of about sixty folio volumes, which bring the student down to within three days of the end of the month of October; but a large store of material is being utilized in order to complete that month forthwith, and further stores have been accumulated towards the Lives of the Saints for November and December, about 4000 of such biographies being still to be actually written. Moreover, the earlier volumes are very incomplete, and at least the months of January to April need rewriting. The principle on which the Bollandists have worked is an excellent one. They have not themselves written the lives of the Saints, but they publish every scrap of record, and all the ancient acts and lives of the Saints that are extant. The work is a storehouse of historical materials. To these materials the editors prefix an introductory essay on the value and genuineness of the material, and on the chronology of the Saint's life. They have done their work conscientiously and well. Only occasionally have they omitted acts or portions of lives which they have regarded as mythical or unedifying. These omissions are to be regretted, as they would have been instructive. Another valuable repository of the lives of Saints is Mabillon's "Collection of the Acts of the Saints of the Order of S. Benedict," in nine volumes, published 1668-1701. The arrangement in this collection is by centuries. Theodoric Ruinart, in 1689, published the Acts of the Martyrs, but not a complete series; he selected only those which he regarded as genuine.