Conversation so far:
Did David McCullough have any issues with grasping an audience?
Was it always up hill or did David McCullough have some bad spots?
Was any of David McCullough's works published?
DavidMcCullough's book The Johnstown Flood was published in 1968.

Question: Did he ever take a sabbatical
Self-contained rewrite: Did David McCullough ever take a sabbatical?