Okay, because certain things from the quests are a bit confusing, i'll explain this:
If you give the stockpiled items from the lord back to the person who gave you hints about its wereabouts, you'll get a special item. Here is what you get for what:
bomy lord horn -
Merit Badge
mushroom lord spore -
Magnifying Glass
rabbit lord tooth -
Rabbit Tooth Charm
glok lord ectoplasm -
Universal Solvent
Each of these, you can trade for something else. Most of the time these items are:
Merit Badge -
Toy Cannon/Glass Sword
Magnifying Glass -
Toy Cannon
Rabbit Tooth Charm -
Silver Ear Rings
Universal Solvent -
Walking Stick
Each of the now gained item, can be traded for another:
Toy Cannon -
Shiny Key 
Walking Stick -
Whatsit
Silver Ear Rings -
Handkerchief / Carving
Now, you can do several things with these items:
Whatsit: make a Clockwork from this with several other items, gained trough escorting and mining.
Handkerchief / Carving: trade this for a Doohickey. The doohickey can be crafted into an icebox, if you also have other items, gained by mining/escorting/questing/spellcasting.
What to do with these new items? Here's the answer:
Icebox - trade this for a Gold Key
Clockwork - trade this for a Cukoo. Trade the Cukoo for a gold key.
Beware:This may seem easy, but it isn't!
Note:I (Felix "Cyrin Cyrilin" van Litsenburg), am not responsible for anything that has gone wrong because of this guide.