PRONOUNS, RELATIVE AND INTERROGATIVE. That after nouns used vocativelyThat. (b) After nouns used vocatively.
“Hail, many-coloured messenger! that ne'er
Dost disobey the wife of Jupiter:
Who with thy saffron wings upon my flowers
Diffusest honey-drops, refreshing showers.
“Hast thou conspired with thy brother, too,
That for thine own gain shouldst defend mine honour?
This close dependence of that on the antecedent, wherein it differs from who and which, is a natural result of its being less emphatic, and therefore less independent, than the two other forms. When the relative is necessarily emphatic, as at the end of a verse, we may sometimes expect that to be replaced by which, for that and no other reason.
“You brother mine, that entertain'd ambition,
Expell'd remorse and nature; who with Sebastian
Would here have kill'd your king.
“Sometimes like apes that mow and chatter at me,
And after bite me; then like hedgehogs which
Lie tumbling in my bare-foot way.