It seems there is dictionary agreement that "round" can be synonymous with "rung," the step of a ladder. Moreover, slaves in the early 19th century may not have been much concerned with such fine points of written English. Can they (or some of them) have pronounced the words alike?

Is there a reproduction of Allen's version on the Internet? Does he say "Sinners, do you love your Jesus" or "Sinner, do you love my Jesus"?

Does he say "Soldiers of the cross" or "Soldier of the cross"?