She has a website, http://bethnielsenchapman.com
On the cd "Beautiful Dreamer"
Her latest cd is a collection of Latin Hymns, on her own (BNC Records) label. Her website mentions sheet music, so it may be available for this song from her.
She supports herself in Nashville as a songwriter.

"In the Eye Abides the Heart" is a translation, by Stephen C. Foster (1851) of a German composition, "In den Augen liegt das Herz," words by Franz von Kobell (1841), to a melody by Franz Wilhelm Abt, Opus 54, no. 1.

Original poem, with melody, and translations by Stephen C. Foster, and by George Linley: http://ingeb.org/Lieder/indenaug.html
In den Augen

The translation by Foster and Midi also at: In the Eye