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.
Did David McCullough ever take a sabbatical?

Question: did his family ever have any impression in his work
Self-contained rewrite: Did David McCullough's family ever have any impression in his work?