Conversation so far:
Who was the leader of the group ?
Hoppy Jones, an important personality to the group, died in October 1944.
Who was the lead guitarist ?
CANNOTANSWER.
Who else was in the group ?
Charlie Fuqua was drafted into the US Army.
He chose his friend Bernie Mackey to be his temporary replacement.
Did he come back to the group after he left the army ?
Mackey was replaced by Huey Long in March 1945.
Long completed the role as a "fill in" until Fuqua finally returned in October 1945.
Who else was in the group ?
Herb Kenny sang with the group from 1945 to 1951 when he went out for a career as a solo artist.
Who replaced him after he left ?
The last bass singer for the Ink Spots was Adriel McDonald who was with the group from 1951 to 1954.
Do you know of any other member ?
Billy "Butterball" Bowen.

Question: How did he stayed with the group ?
Self-contained rewrite: How lond did Billy "Butterball" Bowen stay with the Ink Spots?