Lewis and Harris MacLeod, and those on Lewis being referred to as from the clan MacLeod of Lewis. Lewis is also the ancestral home of Clan Morrison. The Lewis chessmen is a famous collection of 12th-century chess pieces, carved from walrus ivory and mostly in the form of human figures, which were discovered in Uig in 1831. A major industry on the island is the production of Harris tweed fabric, which is handmade on the island; by law only fabric produced in the Outer Hebrides can be called Harris tweed. The Lewis Trilogy of novels ("The Blackhouse", "The Lewis Man" and "The Chessmen")
Knitted fabric edges are known as the "selvages"; the word derives from "self-edges", meaning that the stitches do not need to be secured by anything else. Many types of selvages have been developed, with different elastic and ornamental properties. Edges are introduced within a knitted fabric for button holes, pockets, or decoration, by binding/casting off and re-casting on again (horizontal) or by knitting the fabrics on either side of an edge separately. Two knitted fabrics can be joined by embroidery-based grafting methods, most commonly the Kitchener stitch. New wales can be begun from any of the edges of a knitted fabric; this