Numbers, Their Occult Power and Mystic Virtues, by W. Wynn Westcott, [1911], at sacredtexts.com

PAGE 
Preface to the First Edition  
„ „ Second Edition  
„ „ Third Edition  
PART I. 

Pythagoras, his Tenets and his Followers  
PART II. 

Pythagorean Views on Numbers  
PART III. 

Kabalistic View on Numbers  
PART IV. 

Properties of the Numbers According to the Bible, the Talmuds, the Pythagoreans, the Romans, Chaldeans, Egyptians, Hindoos, Mediæval Magicians, Hermetic Students and the Rosicrucians:— 

1. Monad  
2. Dyad  
3. Triad  
3½. Three and a Half  
4. Tetrad  
5. Pentad  
6. Hexad  
7. Heptad  
8. Ogdoad  
9. Ennead  
10. Decad  
11. Eleven  
12. Twelve  
13. Thirteen  
Some Hindoo Uses of Numbers  
Other Higher Numbers  
Numbers of the Apocalypse 