A serious historian, using written sources, is bound to pay more attention to those who wrote them.

Just ask any serious historian how much meaningful history can be taught without reference to historical facts.

This figure is regarded by at least one serious historian of the matter as "probably exaggerated."

The reason we lost, in the end, is not in doubt to any serious military historian.

No serious historian who writes about the assassination in the future will be able to ignore it.

And some serious historians are already commenting about the precedent.

However, this version is now discarded by most serious historians.

Surely serious historians have a responsibility to incorporate even those facts that don't particularly suit their interpretations.

It seemed a very odd place for a man who prides himself on being a serious British historian.

This book established Roosevelt's reputation as a serious historian.