However, this photograph is not widely known outside medical circles.

Only a dozen photographs of Ruth are known to exist.

Only two photographs of him are known to exist.

His photographs became known for their candid and expressive quality.

No photographs or drawings of him are known to exist today.

However, no photograph of the airman's execution is known to exist.

No photographs of this particular vehicle are known to exist.

His photographs are known for their powerful depictions of human suffering.

Only one photograph of the species is known to exist.

Until recently, only a single photograph of him was known to exist.