> In general, people drew larger letters at the
> beginnings of things. Then they did the same at
> the beginnings of Important Things.

thanks, the use is unchanged then. this rings a bell now with the
little history I learned in calligraphy training. so does the history
follow as: letter glyps were the "caps" as we label them today, they
were enlarged for emphasis, small (unemphasized) letters then morphed
into the their own shapes over time?

I'd still be interested to know the period of the lowercase evolution.
which script developed lowercase letters first? when did the others
follow?

At the time letter enlargement was introduced as a means of emphasis,
what other forms of emphasis were already in use?