Spider Silk can be harvested by anyone under level 7 from Harlan's Trap. Simply type "get silk" once you are in the tunnels. It can be woven into many interesting items, increasing your weave ability. The items are: Rings, Bracelets, Gloves, Boots and a Magical Cloak. When worn, the cloak makes it harder for the wearer to be stolen from.
Directions from Xroads: 8w, 5s, 9w, 1s, ne.