As to common—that is, not proper—nouns ending with an s, one doesn’t, at least not in recently published text,*21 encounter the likes of the boss’ office the princess’ tiara which I find positively spooky-looking, and for most of us, then, the boss’s office the princess’s tiara is the no-brainer way to go.
On this point I must disagree. But I read a lot of old literature.
