The original sewing thread was animal ligaments or horsehair, used to sew furs together during the Stone Age. Developments saw linen becoming dominant, and would be used in different thicknesses and colours depending on the task.  Silk would be used by the wealthy, especially in embroidery and when sewing silk fabrics.  Wool might also be used for sewing woollen garments, probably mainly by the lower classes.  Cotton, a cheaper alternative to silk, originally became available and popular in the early 19th Century when Napolean cut off supplies of raw silk to the English silk weavers.