3. Proper names of foreigners to be alphabetically arranged under the prefixes Dal, Del, Della, Des, Du, Le, La; but not under the prefixes D', Da, De, Von, Van, Van der. English names to be arranged under the prefixes De, De la, Van, Mac, O', etc. [80]
4. Peers to be arranged under their titles, and not under their family names, except in such cases as that of Horace Walpole, where a man is seldom known by his title. Bishops, deans, etc., to be sought under their family names. [87]
5. Sovereigns, saints, and friars to be registered under their Christian names. [91]
6. Latin authors to be registered under their nomens, except in those cases where the agnomen has been popularly adopted. [101]
7. Oriental names to be registered in accordance with the system adopted by a recognized authority on the subject. [95]
8. When an author has changed his name, he is to be registered by the last one adopted. [97]
9. Married women to be registered under their married name, except in those cases where they have only written under their maiden name. [98]
10. When an author has adopted several pseudonyms at various times, all are to be brought together under the author's true name. When an author has consistently used one pseudonym, and is solely known by that name, he can be registered under it, with a reference from his true name. [146]
11. Christian names of authors are to follow their surnames, within parentheses, and are always to be written in full. [95]
Non-Author Headings.