Outline, for composition, [174-177]; illustration of, [175].
Outside address, of letters, [164-166].
Outside of, [42], Glossary.
Over-statement of facts, rule against, [201].
Over with, Glossary.
Pants, Glossary.
Paragraphing of letters, [161].
Paragraphs, [148-153]; coherence in, [151-153]; emphasis in, [153]; indentation of, [149]; in letters, [161]; length of, [148]; unity in, [149-151].
Parenthesis marks, use of, [142]; too frequent use of, [121] (1-b).