The information you seek has moved.

Information about

 Childs, Edwin O For a Heart to Praise My God
(harp, high voice & French horn)

is now found here.

At the River: music for flute, voila and harp may be found here.

Other resources:

works for choir and harp

works for choir and horn

sheet music: horn and harp, harp solo, Celtic harp, viola, lever harp, pedal harp