The object of this short list is merely to supplement the marginal notes by pointing out to a reader desirous of going deeper into the subject the most recent and accessible works upon it. That they should be accessible is, in its intention, the most important thing; and therefore only books easily and cheaply obtainable will be mentioned.
Matthew Arnold.--THE STUDY OF CELTIC LITERATURE. Popular Edition. London, 1891.
Ernest Renan.--THE POETRY OF THE CELTIC RACES (and other studies). Translated by William G. Hutchinson. London, 1896.
Magnus Maclean, M.A., D.C.L.--THE LITERATURE OF THE CELTS. Its History and Romance. London, 1902.
Elizabeth A. Sharp (editor).--LYRA CELTICA. An Anthology of Representative Celtic Poetry. Ancient Irish, Alban, Gaelic, Breton, Cymric, and Modern Scottish and Irish Celtic Poetry. With introduction and notes by William Sharp. Edinburgh, 1896.
Alfred Nutt.--CELTIC AND MEDIÆVAL ROMANCE. No. 1 of Mr. Nutt's "Popular Studies in Mythology, Romance, and Folk-lore". London, 1899.
H. d’Arbois de Jubainville.--LA CIVILISATION DES CELTES ET CELLE DE L’ÉPOPÉE HOMÉRIQUE. Paris, 1899.
Patrick Weston Joyce.--A SOCIAL HISTORY OF ANCIENT IRELAND, treating of the Government, Military System, and Law; Religion, Learning, and Art; Trades, Industries, and Commerce; Manners, Customs, and Domestic Life of the Ancient Irish People. 2 vols. London, 1903.
Charles I. Elton, F.S.A.--ORIGINS OF ENGLISH HISTORY. Second edition, revised. London, 1890.
John Rhys.--CELTIC BRITAIN. "Early Britain" Series. London, 1882.
H. d’Arbois de Jubainville.--INTRODUCTION A L’ÉTUDE DE LA LITTÉRATURE CELTIQUE. Vol. I of the "Cours de Littérature celtique". Paris, 1883.
H. d’Arbois de Jubainville.--LE CYCLE MYTHOLOGIQUE IRLANDAIS ET LA MYTHOLOGIE CELTIQUE. Vol. II of the "Cours de Littérature celtique". Paris, 1884. Translated into English as
THE IRISH MYTHOLOGICAL CYCLE AND CELTIC MYTHOLOGY. With notes by R. I. Best. Dublin, 1903.
Alfred Nutt.--THE VOYAGE OF BRAN, SON OF FERAL. An Irish Historic Legend of the eighth century. Edited by Kuno Meyer. With essays upon the Happy Otherworld in Irish Myth and upon the Celtic Doctrine of Rebirth. Vol. I--The Happy Otherworld. Vol. II--The Celtic Doctrine of Rebirth. Grimm Library, Vols. IV and VI. London, 1895-1897.
THE FAIRY MYTHOLOGY OF SHAKESPEARE. No. 6 of "Popular Studies in Mythology, Romance, and Folklore". London, 1900.
Patrick Weston Joyce.--OLD CELTIC ROMANCES Translated from the Gaelic. London, 1894.
Lady Gregory.--GODS AND FIGHTING MEN. The story of the Tuatha Dé Danaan and of the Fianna of Erin. Arranged and put into English by Lady Gregory. With a Preface by W. B. Yeats. London, 1904.
Alfred Nutt.--OSSIAN AND THE OSSIANIC LITERATURE. No. 3 of "Popular Studies in Mythology, Romance, and Folk-lore". London, 1899.
John Gregorson Campbell, Minister of Tiree.--THE FIANS. Stories, poems, and traditions of Fionn and his Warrior Band, collected entirely from oral sources. With introduction and bibliographical notes by Alfred Nutt. Vol. IV of "Waifs and Strays of Celtic Tradition". London, 1891.
Alfred Nutt.--CUCHULAINN THE IRISH ACHILLES. No. 8 of "Popular Studies in Mythology, Romance, and Folklore". London, 1900.
Lady Gregory.--CUCHULAIN OF MUIRTHEMNE. The story of the Men of the Red Branch of Ulster. Arranged and put into English by Lady Gregory. With a Preface by W. B. Yeats. London, 1902.
Eleanor Hull.--THE CUCHULLIN SAGA IN IRISH LITERATURE. Being a collection of stories relating to the Hero Cuchullin, translated from the Irish by various scholars. Compiled and
edited with introduction and notes by Eleanor Hull. With Map of Ancient Ireland. Grimm Library, Vol. VIII. London, 1898.
H. d’Arbois de Jubainville.--L’ÉPOPÉE CELTIQUE EN IRLANDE. Vol. V of the "Cours de Littérature celtique". Paris, 1892.
L. Winifred Faraday, M.A.--THE CATTLE RAID OF CUALGNE (Táin Bo Cuailgne). An old Irish prose-epic translated for the first time from the Leabhar na h-Uidhri and the Yellow Book of Lecan. Grimm Library, Vol. XVI. London, 1904.
Ivor B. John.--THE MABINOGION. No. 11 of "Popular Studies in Mythology, Romance, and Folklore". London, 1901.
Lady Charlotte Guest--THE MABINOGION. From the Welsh of the LLYFR COCH O HERGEST (the Red Book of Hergest) in the library of Jesus College, Oxford. Translated, with notes, by Lady Charlotte Guest.
First edition. Text, translation, and notes, 3 vols., 1849.
Translation and notes only, 1 vol., 1877.
The Boys' Mabinogion, 1881.
J. Loth.--LES MABINOGION, traduits en entier pour la première fois en français avec un commentaire explicatif et des notes critiques. 2 vols. Vols. III and IV of De Jubainville's "Cours de Littérature celtique". Paris, 1889.
J. A. Giles, D.C.L.--OLD ENGLISH CHRONICLES, including . . . Geoffrey of Monmouth's British History, Gildas, Nennius .. . Edited, with illustrative notes, by J. A. Giles, D.C.L. "Bohn's Antiquarian Library". London, 1901.
Sir Thomas Malory.--THE MORTE DARTHUR. Edited by Dr. H. Oskar Sommer. Vol. I--the Text. Vol. II--Glossary, Index, &c. Vol. III--Study on the Sources. London, 1889-1891.
Jessie L. Weston.--KING ARTHUR AND HIS KNIGHTS. A survey of Arthurian romance. No. 4 of "Popular Studies in Mythology, Romance, and Folklore". London, 1899.
Alfred Nutt.--THE LEGENDS OF THE HOLY GRAIL. No. 14 of "Popular Studies in Mythology, Romance, and Folklore" London, 1902.
John Rhys.--LECTURES ON THE ORIGIN AND GROWTH OF RELIGION AS ILLUSTRATED BY CELTIC HEATHENDOM. "The Hibbert Lectures for 1886." London, 1898.
John Rhys.--STUDIES IN THE ARTHURIAN LEGEND. Oxford, 1901.
T. Crofton Croker.--FAIRY LEGENDS AND TRADITIONS OF THE SOUTH OF IRELAND.
John Rhys.--CELTIC FOLKLORE, WELSH AND MANX. 2 vols Oxford, 1901.
Wirt Sikes.--BRITISH GOBLINS: Welsh Folklore, Fairy Mythology, Legends, and Traditions. By Wirt Sikes, United States Consul for Wales. London, 1880.
George Laurence Gomme.--ETHNOLOGY IN FOLKLORE, "Modern Science" Series. London, 1892.