But it was Williams's play in the final minutes that proved invaluable.

If you later disagree with the company about what was said at the time, having your own record could prove invaluable.

No one ever knows it all, but the experience should prove invaluable.

As for Emily, what he'd found out today might one day prove invaluable.

This information has proved invaluable and could not have been gathered in any other way.

This material has proven invaluable to industry and space travel.

The device would have proven invaluable to him right about now.

He wrote everything down, which proved invaluable for historians following him.

Later, this linguistic ability and knowledge was to prove invaluable.

On an occasion such as this one it might prove invaluable.