"Will they hold torches and hand them off to one another as they race on horses? Or what do you mean?"
"That's it," said Polemarchus.
[See the Laws 776b for Plato's metaphor about passing the torches. Adams has some comments as well.
I've been linking to the Perseus mirror sites because the one at Tufts doesn't seem to be working. Sorry if it takes a little longer for your computer to connect to Berlin.]