An annotated copy of Porter's script for 'The Night Sky in September' on the Harvest Moon rising at the same time each evening; Jupiter's moons and the discovery of the 12th moon at the Mount Wilson Observatory in the previous year; the orbits of the four larger moons; Jupiter in Taurus near the Pleiades; the apparent retrograde motion of the planets; the epicycle theory and its overthrow by observation of Jupiter's moons; Milton and Galileo, Roemer and the velocity of light and its finite value.