Conversation so far:
What is Fitzroy?
After he retired as a player, Walls immediately took over as coach of Fitzroy.
What year did he begin coaching Fitzroy?
1980.
Until when did he remain in that position?
1985.
What league is Fitzroy part of?
Walls lifted the Lions to their best era since winning a premiership in 1944.
What was Fitzroy's record in 1980?
disappointing.
Did their record improve during Walls' tenure as coach?
Robert would coach Fitzroy Football Club for 115 games (60 wins - 54 losses - 1 draw).

Question: Why did Walls stop working for the Fitzroy club?
Self-contained rewrite: Why did Robert Walls stop working for the Fitzroy club?