[Bell Historians] Latin (was Greek)

[Frank King]

Dear Dickon

I am replying on list because the text
you want translating into Latin is very
similar in sentiment to a well-known ditty
which you sometimes find on sundials or
headstones:

    My glass has run,
    Yours is running;
    Be wise in time,
    Your hour is coming.

I have been trying to track down the source
of this but failed.  If you or anyone else
can help I'd be grateful.

Is your variant out of your own head or did
you find it somewhere?

Best wishes

Frank