Quae cum ita se habeant, dum Emus. Car. Mechliniensis juxta demandatas ei partes memoratum doctorem Gerardum Casimirum Ubaghs admonebit officii sui eique vehementius inculcabit, ut doctrinam suam ad exhibitas S. consessus notationes omnino componat, erit vigilantiae tuique studii pastoralis una cum archiepiscopo aliisque suffraganeis episcopis omnem dare operam ut hujusmodi Emorum. Patrum sententia executioni nulla interjecta mora mandetur, _neque in ista Lovan. Universitate_, quae ab Archiep. Mechl. et suffrag. antistitum auctoritate pendet, _neque in seminariorum_ scholis aliisque lyceis illae amplius explicentur doctrinae, quae uti primum ad Apost. Sedis judicium delatae fuerunt, visae sunt a scholis catholicis amandandae. Haec significanda mihi erant Emorum. Patrum nomine Amplitudini Tuae cui fausta omnia ac felicia precor a Domino. Amplitudinis Tuae Addictissimus uti Frater, C. Card. Patrizi. Romae d. 11 Oct., 1864. NOTICES OF BOOKS. I. _Juris Ecclesiastici Graecorum Historia et Monumenta, jussu Pii IX. Pont. Max._, Curante I. B. Pitra, S. R. E., Card. Tom. I. a primo p. C. n. ad VI. sæculum. Romæ, Typis Collegii Urbani. MDCCCLXIV. 1 vol. fol. pagg. lvi.-686. The vast erudition which has made the name of Cardinal Mai for ever illustrious in the history of ecclesiastical literature, reappears in Cardinal Pitra, whom the wisdom of Pius IX. has lately called to be honoured by, and to do honour to, the Roman purple. The book before us is worthy of the reputation of the learned Benedictine, to whom we owe the _Spicilegium Solesmense_, and in whose person the best glories of the _Maurini Editores_ have been revived. As the title imports, the volume is divided into two parts, one being devoted to the monuments, the other to the history, of the Greek ecclesiastical law. Of these monuments there are two distinct classes. The first contains all such as may be styled _juris apostolici_, viz., the canons of the apostles, their constitutions _de mystico ministerio_, their sentences, the acts of the council of Antioch, select portions of the apostolic constitutions, penitential canons, and the eight books of the constitutions. The second embraces the canons of councils held during the fourth and fifth centuries--the councils of Nice, of Ancyra, of Neo-Caesarea, of Gangre, of Constantinople, of Ephesus, and of Chalcedon. Next follow the canonical epistles of the Fathers--viz., two letters of St. Dionysius of Alexandria, one to Basilides, the second to Conon, which latter is here published for the first time. The canons of St. Peter of Alexandria, derived from two sermons on Pentecost and Easter; the canonical letter of St. Gregory of Neo-Caesarea, and his exposition of faith; three epistles of St. Athanasius; the epistles of St. Basil the Great to Amphilochius, to Gregory the Priest, to the chor episcopi, and to the bishops; the epistle of St.