Meanings of public lecturer in English

Now, what do you think of your brother as a public lecturer?

His career, too, as a public lecturer, has been both successful and brilliant.

He also gained much reputation as a public lecturer.

It was quite a new thing for me to appear as a public lecturer; but I consented.

Fifteen or sixteen years after his Kansas adventures I became a public lecturer, and he was my agent.

You are now a public lecturer.

But in reality the whole business of being a public lecturer is one long variation of boredom and fatigue.

Tyndall was also a gifted public lecturer, an avid promoter of the public understanding of science, and a noted mountaineer.

An intellectual superstar in America, he distinguished himself as an opera critic, pianist, television celebrity, politician, media expert, popular essayist and public lecturer.

It was during these years that he did his best work as a journalist, and all his work as a public lecturer on aesthetics.

Might he not have told his readers of the excessive earnings of public lecturers?