PISTHETAERUS Ha! what is this? A masked man!
PROMETHEUS Can you see any god behind me?
PISTHETAERUS No, none. But who are you, pray?
PROMETHEUS What's the time, please?
PISTHETAERUS The time? Why, it's past noon. Who are you?
PROMETHEUS Is it the fall of day? Is it no later than that?(1)
f(1) Prometheus wants night to come and so reduce the risk of being seen from Olympus.
PISTHETAERUS Oh! 'pon my word! but you grow tiresome.
PROMETHEUS What is Zeus doing? Is he dispersing the clouds or gathering them?(1)
f(1) The clouds would prevent Zeus seeing what was happening below him.