The five Chinese characters on the right refer to an address, loosely translated to "Nanyue Mojingtai".
In particular, the first two characters - "Nanyue" - refer to the 'Southern Mountain' - one of the Five Great Mountains of China (
https://en.wikipedia.org/wiki/Mount...f%20China.). This does correspond to the handwritten "nanyoh" on the cover (below the crossed-out "Hengyang").
Thus, I think it is the address of Rev and Mrs. Paul Abbotts written in Chinese.