either a strong sound of stones cast down, either the running unseen of beasts playing, either the strong voice of beasts lowing, either (an) echo sounding again from (the) highest hills, made them failing for dread. [or strong sound of stones falled down, or the unseen course of playing beasts, or the strong voice of lowing beasts, or the again-sounding rebounding of sound from the highest hills, made them failing for dread.]