I am not 100% sure about the "Ross's" and "Alice's" but I would guess that it is something like this: Ross's books ['rɒsɪz bʊks] Dickens's books [ˈdɪkɪnzɪz bʊks] Alice's birthday [ˈalɪsɪz ˈbɜːθdeɪ] The boss's handwriting [ðə ˈbɒsɪz ˈhændˌraɪtɪŋ]

Ross's books : rosiz - we do add another syllable. Dickens's books - we do not add another syllable. Alice’s birthday - we do add another syllable The boss's handwriting - We do add another syllable.

ok these are odd ones, it is ross-is book (jsut how it sounds when you say it to the right speed) with charls dickens, we all jsut say it how it is jsut dickens book alice-is birthday the boss-is handwriting. there :)

I personaaly thinks/rosis/ and others you are right.