How to use "post" in a sentence

When they found a letter in his pocket which proved that he had been sent to spy on them, they tied him to a post inside the inn,

He was so confused that he did not recognize Javert, tied to a post inside the inn throughout the battle.

I was asked to post it, but I didn't

Enjolras, inside the wine shop, turned to Javert, who was still tied to the post.

Above the crowd he can see the NYPD camera on top of a tall post, and he pushes past the tourists to reach it

George, on the other hand, hadn't filled a post of genuine stature and authority until six years ago, when he was thirty-six