Goold Brown,
The Grammar of English Grammars…
“ In the English language, the distinction of the objective case is observable only in the pronouns. Cases being nothing but inflections, where inflections do not exist, there can be no grammatical distinction of cases, for the terms inflection and case are perfectly synonymous and convertible. As the English noun has only one change of termination, so no other case is here adopted. The objective case is noticed in the pronouns; and in parsing nouns it is easy to distinguish subjects from objects. ”
