One is the helmet mask from East Africa - a sinister rounded head that is hung high on the wall, the better to emphasize its downcast eyes.

His eyes glowed like crimson brands through the slits in the steel, cone-shaped helmet mask that sat on his shoulders.

The Trill tourists leaned in further, until their helmets were pressed flat against the window, their noses pressed flat against their helmet masks.

He had not activated his helmet mask, but his naked face, grim and coldly furious, frightened her more than any rendition of the Horus hawk.

She tapped the tumbler switch on her necklace, and her helmet mask disappeared.

A helmet mask of a wild spirit in the guise of a horned animal may look affable enough, with its boxy mouth and wide-eyed stare.

The massive beak, thrust out from the helmet mask, also had the look of metal.

The strangers wore helmet masks of hardened buffalo hide onto which were sewn bones and coloured pebbles.

It references typical helmet masks made by the Senufo people of Mali and the Ivory Coast that often combine the facial features of different wild animals.