Bilharz, Atwood, and Naonobu (the trio of craters to the northwest of Langrenus), of which the central one (Atwood) was also called "Aller" by H.P.Wilkins.
It seems that the orbiting crew of Apollo 14 observed rusty colored spots on the eastern wall of Langrenus (see: Apollo 14 Preliminary Science Report, P.275).
Danny Caes,
Public Observatory of Ghent - Belgium.
