Question: Who wrote the hymn that was reworked into a song concerning the death, funeral, and mourning of the narrator's mother, by an American musician and founding member of The Carter Family, one of the most notable acts in the history of country music?
Context: Helen Myrl Carter (September 19, 1927 – June 2, 1998) was an American country music singer.  The eldest daughter of Maybelle Carter, she performed with her mother and her younger sisters, June Carter and Anita Carter, as a member of "Mother Maybelle and the Carter Sisters", a pioneering all female country/folk music group.  The group was also known as The Carter Family. Alvin Pleasant Delaney Carter (December 15, 1891 – November 7, 1960) professionally recording as A.P. Carter, was an American musician and founding member of The Carter Family, one of the most notable acts in the history of country music. Ezra J. Carter (also known as Eck Carter) (1898–1975) was a member of the Carter Family of Virginia.  Ezra Carter managed the famous Carter Family, a traditional American folk music group that recorded between 1927 and 1956.  He was the husband of Maybelle Addington Carter (1909–1978), brother of Alvin Pleasant "A.P." Delaney Carter (1891–1960) and father of Helen Carter (1927-1998), June Carter (1929-2003) and Anita Carter (1933-1999). The Carter Family Fold is a musical performance and concert venue located near Hiltons, Virginia.  It is dedicated to the preservation and performance of old time country and bluegrass music.  It is named in honor of the original Carter Family, A.P., Sara, and Maybelle, who were among the earliest recording artists in country music, with their first records on RCA Victor being released in 1927.  The Fold was founded by Janette Carter, daughter of A.P. and Sara Carter, in 1979. "Mother" Maybelle Carter (May 10, 1909 – October 23, 1978) was an American country musician.  She is best known as a member of the historic Carter Family act in the 1920s and 1930s and also as a member of Mother Maybelle and the Carter Sisters. "Can the Circle Be Unbroken (By and By)" is the title of a country/folk song reworked by A. P. Carter from the hymn "Will the Circle Be Unbroken? " by Ada R. Habershon and Charles H. Gabriel.  The song's lyrics concern the death, funeral, and mourning of the narrator's mother. Single Girl, Married Girl is a folk song made famous by The Carter Family, about the differences in lifestyle between the two title characters.  The song was originally released on Victor Records in 1928 as the a-side of Victor 20937, the Carter Family’s second 78-rpm record for the label.  It was recorded on August 2, 1927, the second day of their first session with producer and engineer Ralph Peer, and released in January 1928.  This version was later included in Harry Smith’s Anthology of American Folk Music, Vol.  3.  Notably, the song does not feature A.P. Carter, but is instead a duet between cousins Sara and Maybelle. Danny Sheridan (October 11, 1950 – May 24, 2016) was an American musician, songwriter, producer, actor, and entertainment manager.  In 2006 he also became a radio personality on 97.1 KLSX Free FM (CBS Los Angeles).  He is credited as an influential electric bass player, and as the founder of the Eli Radish Band, pioneers of the so-called outlaw country music genre.  This is a style that Sheridan's former band-mate/vocalist David Allan Coe continues to perform today, with a string of hit songs like “Would You Lay with Me (In a Field of Stone)” and the anti-labor tune, “Take This Job And Shove It”.  Still in his teens, Sheridan's Eli Radish toured with such notable acts as The Who and The Doors.  The lyrics of Coe's "Longhaired Redneck" forever memorialized the concerts he performed with Sheridan while fronting the Eli Radish Band.  In 2014 Sheridan began managing Coe and co-produced his new CD "Just As I Am", with Boris Menart. This is a comprehensive discography of Carter Family, often cited as "the most influential group in country music history": (For recordings by the second generation of The Carter Family see The Carter Sisters.) Kenneth Jones (1952–1969), was the son of Helen Myrl Carter (of country music's Carter Family) and of Glenn Jones.  He is best remembered for a song he wrote called "Sing A Traveling Song" which appeared on Johnny Cash's albums "Hello, I'm Johnny Cash" and "Johnny Cash at Madison Square Garden".  Kenneth was Cash's nephew-in-law.  Cash's second wife, June Carter Cash, was Helen's sister.  Kenneth, or Kenny as he was also known, wrote many songs and was a talented musician.  At the time of his death he was under contract with Monument Records and appeared destined for a highly successful career.  Following his death the Carter Family recorded one of his songs, "2001 Ballad to the Future".  A few have noted the lyrics as being eerily prophetic of the September 11, 2001 terrorist attacks on the United States which took place more than thirty years after the song was written.
Answer: Ada R. Habershon and Charles H. Gabriel