Shu Tong Watercolors? Need Help to ID Signature

I recently acquired these two beautiful Watercolors at an estate sale and am trying to pinpoint the signature.
It appears to me to say "Shu Tong" but I can't be sure. Can anyone tell me what the writing says beside the one signature? Could these actually be Shu Tong (the famous Chinese Monk) Watercolors?

ANY info you can give me is GREATLY appreciated.

Thank You!