About half past one o'clock in the morning
But the projectile continued to advance with almost uniform speed around the lunar disc . The travelers , we may easily imagine , did not dream of taking a moment 's rest . Every minute changed the landscape which fled from beneath their gaze . About half past one o'clock in the morning , they caught a glimpse of the tops of another mountain . Barbicane , consulting his map , recognized Eratosthenes . It was a ringed mountain nine thousand feet high , and one of those circles so numerous on this satellite . With regard to this , Barbicane related Kepler 's singular opinion on the formation of circles .