| M. P.* | Leon Jacques Maxime Prinet.- Formerly Archivist to the French National Archives. Auxiliary of the Institute of France (Academy of Moral and Political Sciences). Author of L’Industrie du sel en Franche-Comte; Les Armoiries écartelés des conjoints; François I et le comté de Bourgogne.
|  | Brienne-le-Château; Brissac, Dukes of. |
| M. St J. | Molyneux St John. |  | British Columbia (in part). |
| N. W. T. | Northcote Whitbridge Thomas, M.A.- Government Anthropologist to Southern Nigeria. Corresponding Member of the Société d’Anthropologie de Paris. Author of Thought Transference; Kinship and Marriage in Australia; &c.
|  | Boomerang. |
| O. Ba. | Oswald Barron, F.S.A.- Hon. Genealogist to Standing Council of the Honourable Society of the Baronetage. Editor of the Ancestor, 1902–1905.
|  | Butler: Family. |
| O. Br. | Oscar Briliant. |  | Bohemia: Geography and Statistics; Budapest. |
| O. H. | Olaus Magnus Friedrich Henrici, Ph.D., LL.D., F.R.S.- Professor of Mechanics and Mathematics in the Central Technical College of the City and Guilds of London Institute. Author of Vectors and Rotors; Congruent Figures; &c.
|  | Calculating Machines. |
| P. A. K. | Prince Peter Alexeivitch Kropotkin.- See the biographical article: Kropotkin, P. A.
|  | Bokhara (in part); Bulgaria: Eastern. |
| P. C. M. | Peter Chalmers Mitchell, M.A., D.Sc., LL.D., F.R.S.- Secretary to the Zoological Society of London. University Demonstrator in Comparative Anatomy and Assistant to Linacre Professor at Oxford, 1888–1891. Lecturer on Biology at Charing Cross Hospital, 1892–1894; at London Hospital, 1894. Examiner in Biology to the Royal College of Physicians, 1892–1896, 1901–1903. Examiner in Zoology to the University of London, 1903.
|  | Breeds and Breeding. |
| P. C. Y. | Philip Chesney Yorke, M.A.- Magdalen College, Oxford.
|  | Boleyn, Anne; Bolingbroke; Bothwell; Bristol, 1st and 2nd Earls of; Buckingham, 1st Duke of (in part); Buckingham, 2nd Duke of. |
| P. Gi. | Peter Giles, M.A., LL.D., Litt.D.- Fellow and Classical Lecturer of Emmanuel College, Cambridge, and University Reader in Comparative Philology. Late Secretary of the Cambridge Philological Society. Author of Manual of Comparative Philology; &c.
|  | C. |
| P. G. K. | Paul G. Konody.- Art Critic of the Observer and the Daily Mail. Formerly Editor of the Artist. Author of The Art of Walter Crane; Velasquez, Life and Work; &c.
|  | Bordone. |
| P. S. | Philip Schidrowitz, Ph.D., F.C.S.- Member of Council, Institute of Brewing. Member of Committee of Society of Chemical Industry. Author of numerous articles on the Chemistry and Technology of Brewing, Distilling, &c.
|  | Brandy; Brewing. |
| P. W. C. | Peter William Clayden (d. 1902).- Formerly President, Institute of Journalists, London. Literary Editor of the Daily News. Author of Scientific Men and Religious Teachers; England under Lord Beaconsfield; Early Life of Samuel Rogers; Rogers and his Contemporaries; England under the Coalition; &c.
|  | Bright, John. |
| R. A.* | Robert Anchel.- Archivist to the Department de l’Eure.
|  | Boissy D’Anglais, François Antoine de. |
| R. Ad. | Robert Adamson, LL.D.- See the biographical article: Adamson, R.
|  | Bonaventura, Saint; Bruno, Giordano (in part); Butler, Bishop (in part). |
| R. A. S. M. | Robert Alexander Stewart Macalister, M.A., F.S.A.- St John’s College, Cambridge. Director of Excavations for the Palestine Exploration Fund.
|  | Bozrah; Caesarea Palaestina; Caesarea Philippi. |
| R. G. | Richard Garnett, LL.D.- See the biographical article: Garnett, R.
|  | Burton, John Hill. |
| R. I. P. | R. I. Pocock, F.Z.S.- Superintendent of the Zoological Gardens, London.
|  | Book-Scorpion; Caddis-Fly and Caddis-Worm. |
| R. J. M. | Ronald John McNeill, M.A.- Christ Church, Oxford. Barrister-at-Law. Formerly Editor of St James’s Gazette, London.
|  | Bunker Hill. |
| R. L.* | Richard Lydekker, F.R.S., F.L.S.- Member of Staff of Geological Survey of India, 1874–1882. Author of Catalogues of Fossil Mammals, Reptiles and Birds in British Museum; &c.
|  | Bison; Bovidae; Buffalo. |
| R. N. B. | Robert Nisbet Bain (d. 1909).- Assistant Librarian, British Museum, 1883–1909. Author of Scandinavia: the Political History of Denmark, Norway and Sweden, 1513–1900; The First Romanovs, 1613 to 1725; Slavonic Europe: the Political History of Poland and Russia from 1469 to 1796; &c.
|  | Bocskay, Stephen; Boris Fedorovich Godunov; Boyar; Brahe, Per; Buslaev, Fedor Ivanovich. |