I should add that the tunes, as well as the chorus, bear a resemblance to each other.
(Note to Netscape users- Attempts to get biography on Fanny Crosby in Cyberhymnal brought up "illegal operation." I had to use Internet Explorer to get the information.)

Vance Randolph, in "Ozark Folksongs," vol. 4, p. 74, has a shortened version of "Can the Circle Be Unbroken," which he says "is a favorite with the Pentecostal or Holy Roller singers in Missouri and Arkansas." His version was collected in 1941, thus may have been heard on the radio or taken from a songbook. It is the same as verses 1, 2, 3 and chorus in the DT, which is unattributed. Randolph notes "that it differs widely from the hymn printed in various church songbooks."