Henry Bate, A Short System of English Grammar
“ It is not agreeable to the Principles of Grammar to say that—of a Rose—is the Genitive Case of—Rose, or—to a Rose, the Dative; for of and to are no Part of the Word Rose, but only prefix Particles or Prepositions, which shew the different Relation of the Word Rose. So likewise when we say Alexander's Horse, the Word Alexander's is not the Genitive Case of Alexander; for strictly speaking the 's is no Part of the Word Alexander but the final Letter of the Pronoun Possessive his, and without the Apostrophe we shou'd read it thus ”
