Tailoring was an early skill concept which would have been dedicated to creating things out of Wool, Furs, and Leather. Tailoring appeared in the skills list up until 10 May 2001, but it didn't have any function nor way to train it. Instead of being released as its own skill, the "tailoring ability" was released as part of the Crafting skill on 23 June 2001 (Update).
Sewing skill Use shears with sheep to get wool Kill animals to get furs and skins Tak cow hide to tannery to get leather Use pattern and needle and fur/skin/leather/wool to make: * clothing * water-skin * whip * sling * cloak * leather armour * gloves * boots
Of these ideas, only the ability to make Wool, Leather, Leather Gloves, Boots, and Leather Armour would eventually be implemented in RuneScape, as part of the crafting skill. Water Skins and Clothing are only purchasable from shops.