Chessman of walrus tusk representing two knights back to back, from Skye, mid 13th century

Chess piece, king, crowned and wearing a long mantle over a dalmatic, seated on throne with sword across knees, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, king, crowned and wearing a long mantle over a tunic, seated on throne with sword across knees, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, queen, crowned and wearing a long cloak over a long sleeved gown, seated on throne, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, queen, crowned and wearing a cloak over a knee length long sleeved gown with undergarment extending to feet, seated on throne, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, queen, crowned and holding a drinking horn, seated on throne, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, bishop, wearing a cape over a chasuble and mitre on head, he grasps crosier with both hands, seated on throne, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, bishop, wearing a chasuble over a dalmatic, stole and alb and mitre on head, right hand blesses and left hand holds a crosier, standing, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, bishop, wearing a chasuble over a dalmatic, stole and alb and mitre on head, he grasps crosier with both hands, seated on throne, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Chessman or chess piece, warder or rook as a berserker, wearing an aketon, biting the top of his shield with sword raised and helmet on head, standing, of walrus ivory, found in an underground chamber in the parish of Uig, Lewis in 1831: Scandinavian, late 12th century

Woman's knife handle, or ulu, of walrus ivory, in the shape of a polar bear and extensively engraved: North America, USA, Alaska, Bering Strait, St Lawrence Island, Gambell, Old Bering Sea III, c. 300 - 500 AD

Model of a narwhal with a hinged tusk, carved in walrus ivory: Inuit

Necklace, consisting of six rows of white, green and red glass beads and ivory strung on sinew: North America, USA, Alaska, Nunivak Island, Inuit, 1930s

Whale and walrus harpoon, with spruce shaft, walrus bone foreshaft, walrus ivory point secured to the shaft and foreshaft, ice-pick, finger-rest and line-catch: North America, USA, Alaska, Point Barrow, Arctic, Inupiat, 1820s

Drill bow of walrus ivory engraved with figures commemorating a hunting expedition: Alaska, Inuit

Bow drill, of walrus ivory, engraved on both sides with figures of men and animals: North America, USA, Alaska, Inupiat, 19th century