At Olney, Newton invited Cowper to contribute to a hymnbook that he was compiling. The resulting volume, known as "Olney Hymns," was not published until 1779 but includes hymns such as "Praise for the Fountain Opened" (beginning "There is a fountain fill'd with blood") and "Light Shining out of Darkness" (beginning "God Moves in a Mysterious Way"), which remain some of Cowper's most familiar verses. Several of Cowper's hymns, as well as others originally published in the "Olney Hymns," are today preserved in the "Sacred Harp," which also collects shape note songs.