mitarashi ya sumi sutete aru nochi no tsuki
thrown in a corner
the Ninth Month moon
by Issa, 1818
The font holds water for hand-washing purification at a shrine--
and a reflection of the full moon of Ninth Month, 13th day.
In the old calendar, there were two harvest moons:
the 15th day of Eighth Month (this is the more important meigetsu)
and the 13th day of Ninth Month.