1. Dom Gueranger, _The Liturgical Year_ (1895, Duffy, Dublin, 16 vols. £3 9s.)--This work is a favourite with all lovers of liturgy, It studies and comments on the Church's liturgy day by day, week by week. It gives readers of the Missal and the Breviary a new interest and an additional fervour in their daily prayers. It is a standard work and holds its own wonderfully against all competitors. 2. _Cours De Liturgie Romaine Le Breviare_, L'abbe Bernard, Sulpician (Paris. 1887, 2 vols, 7 francs). This is a text-book written with great care, showing fine scholarship and deep piety. It is the work of a skilled teacher. 3. _Le Breviare Romain, Commente_ par L'abbe Maugere. Paris. 1887, 6 francs.--A very concise and useful work, which I have used often in compiling my book. 4. The articles in the _Catholic Encyclopedia_, on the Breviary and liturgy generally. 5. Duchesne, _Christian Worship_ (London. 1904. 10s.). Very readable and serviceable to students of early Church history. 6. Battifol, _History of the Roman Breviary_. (London, 1912. 15s.) 7. Biron-Baumer, _Histoire du Breviaire_. (Paris. 2 vols. 11 francs.) 8. Baudot, _The Roman Breviary_ (London. Cath. Truth Society. Price 4s.6d.) Monsignor Battifol's book is well and favourably known. It is in English, and has had a large circulation. It received searching and severe criticism from Dom Baumer, the author of _Geschichte des Breviers_. Baumer's work (translated into French by Biron) is a work showing wonderful industry, learning and critical acumen. The great German Benedictine was aided in several parts of his work by Mr. E. Bishop, the English liturgiologist, who intended to translate the work into English. Dom Baudot's book gives in concise form the results of the labours of Battifol and Baumer. The book is readable, accurate, and is excellent value for the price. 9. _The Calendar_. The introductory matter given in the Breviary suffices for the wants of the ordinary student of liturgy. But those who wish for an exhaustive study of times and seasons may safely read _Kalendarium Manuale_, Pars I. _Festa immobilia_, Editio secunda; price 9 lire; and Pars. II. _Festa Mobilia_, price 13 lire, by Rev. N. Nilles, S.J. Calendar study is highly interesting, and the articles in the _Catholic Encyclopedia_ and Father Thurston's articles in the _Month_ on Calendar affairs are always instructive. _The New Psalter_ (Myers and Burton. London. 1915. 3s.6d.) is a very useful and practical help to the understanding and application of the new rubrics. I have quoted several times from its pages,