The story behind the song, Go Tell It on the Mountain, according to www.sharefaith.com:
"In 1907, John W. Works III, a professor at Fisk University and a professional musician, compiled and published Folk Songs of the American Negro, a songbook designed to preserve and promote African American folk-work. Included in this book was Works' arrangement of the song Go Tell It on the Mountain (author unknown). This song was known to have been sung by African American slaves since as far back as at least 1865."
The story behind the song, What Child Is This?, according to www.sharefaith.com:
"William Chatterton Dix (1837-1898) was an insurance salesman. At the age of 29, he was bedridden for many months due to a near fatal illness. During this trying time William began to write hymns. The most memorable and well loved of his songs is the Christmas carol What Child Is This?, which is sung to the melody of the traditional English folk song Greensleeves."