8. The first word of every line in poetry.

9. The pronoun _I_ and the interjection _O_ are written in capitals: as,

_I write: Hear, O earth!_

Other words, besides the preceding, may begin with capitals when they are

remarkably emphatical, or the principal subject of the composition.

The method of denoting capital letters in manuscript is by underscoring

them with _three distinct lines_.