going over

When I was going over the bridge across the Lake of Shining Waters I took the brooch off to have another look at it.

There were many marks of footsteps upon the wet clayey soil, but since the police had been coming and going over it, I was unable to see how my companion could hope to learn anything from it.

Finally, he examined with his glass the word upon the wall, going over every letter of it with the most minute exactness.

I’m always afraid going over bridges.