>>Miss has become a generic unmarried female title, and no longer has it's place in marking the eldest female and consequestly the most eligible to be married. <<

I always thought that Miss was applied to all unmarried females, not just the eldest.

The distinction was that 'Miss X' with no given name defaulted to the eldest, so if you wanted to talk about a younger sister, you had to include that sister's given name. So for example, I would be Miss Holland and my younger sister would be Miss Jane Holland, but we would both be Miss.

If actually in conversation with Jane, though, someone would surely have addressed her to her face as 'Miss Holland', since at that point it would have been quite clear which particular Miss Holland that person (they? he/she? see how I avoid having to make a decision!!!) meant?

Also, did the rule about adding a given name if you wanted to indicate anyone other than the eldest also apply to Mr? I have the impression it did, but wouldn't like to bet on it.