Wood is probably the most important resource in the entire game - nearly every Food Building is constructed from it, as well as most of the Industrial Buildings. The only way to get more wood is for Trees to be placed on the map from the Editor and placing Saw Pits for woodcutters to cut them down and transfer the wood to your Stockpile.
Stone is one of the most vital resources in the game. Without stone, you will not be able to build a Barracks or an Armoury as well as Stone Walls and other important stone buildings for your Castle. Stone is produced by a Stone Quarry, and is taken to the stockpile by Ox Tether. In order for you to get Stone, it must exist on the map. You can also get Stone delivered to you by Carters from your Estates but it must still exist in the map.
Iron is yet another crucial resource - but is only needed really if you intend to make Maces, Armour or Swords for your troops. It is mined from Iron Mines and trsnaorted by Ox Tether to the Stockpile.
Wool is a resource stored only temporarily provided you have a Weaver's Workshop. The Weaver will collect it and turn it into Cloth, in turn retruning it to the Stockpile. It will then be taken to the Lady's Bedchamber for her to make dresses. After her wardrobe is full, there is a dance in the Keep bringing Honour to the Castle.
Wool is taken from the Stockpile by a Weaver and turns it into Cloth. This is then taken to the Lady's Bedchamber for her to make dresses. After her wardrobe is full, there is a dance in the Keep bringing Honour to the Castle.