We were using the song to express the emotion on the toughest part of Pike's journey which was somewhat like Bilbo Baggin's journey in the Hobbit.
from the CD - "Black Is the Color of My True Love's Hair - Starving in the deep snow of the Sangre de Cristos, Pike thinks of home & laments that he may die here. 19th January, 1807, near present-day Westcliffe, Colorado."