When the middle of the floor was clear they were able to get at the manhole cover to the tunnel.

He thought this particular manhole cover had been moved quite often.

Any later and the guy who actually knew why manhole covers are round gets the offer.

He made sure that the manhole cover in the stone floor was closed.

There are those, like artists, who prize a manhole cover for its form.

They opened fire, but the manhole cover was turned in their direction.

A round manhole cover can be more easily moved by being rolled.

The manhole cover closed into place from the inside, made a quarter turn and stopped.

I took a few outside and scattered them on a manhole cover.

They then together would remove the manhole cover and wait for the first groups assigned to come.