A Noun or a Pronoun made the object of a preposition, is governed by it in the objective case.
RULE VIII.—NOM. ABSOLUTE.
A Noun or a Pronoun is put absolute in the nominative, when its case depends on no other word.
RULE IX.—ADJECTIVES.
Adjectives relate to nouns or pronouns.
RULE X.—PRONOUNS.
A Pronoun must agree with its antecedent, or the noun or pronoun which it represents, in person, number, and gender.
RULE XI—PRONOUNS.
When the antecedent is a collective noun conveying the idea of plurality, the Pronoun must agree with it in the plural number.