Where are paintings of Chinese calligraphy somewhere on the East Stairwell?

I think it is the painting in the monument stairs on the 4th floor titled ancient characters.  There are paintings going up and down either stairwell. I am not sure if there is any with Chinese Calligraphy. Some of the old paintings that were vandalized through the years have been painted over. If one does exist it would probably be between the 21st and 22nd floors which has the East Asian collection on them. There is also a beautiful painting done by a student who works here on the 22nd Floor in the elevator lobby that has Japanese writing on it. I hope this helps!