R. G. Latham, The English Language
“ And it is this superadded idea of action that superadds to the verb the phenomena of tense, mood, person, and voice; in other words, the phenomena of conjugation.§ 343. A noun is a word capable of declension only. A {290}verb is a word capable of declension and conjugation also. The fact of verbs being declined as well as conjugated must be remembered. The participle has the declension of a noun adjective, the infinite mood the declension of a noun substantive. Gerunds and supines, in languages where they occur, are only names for certain cases of the verb. ”
