Start: Begin by talking to the Dwarf Commander just north of the Fishing Guild.
Requirements: None!

Getting Started

First off, talk to the Dwarf Commander located a short distance north of the Fishing Guild. He can usually be found wandering around near a small shed, past a fence. He asks for your help to protect the mines, so tell him that you'll help.

Helping Secure the Mine

The Commander will first ask you to help repair the fence to the south, and he'll give you 6 Railings. You just need to inspect each section of the fencing, and when you find a broken one, repair it. After fixing the 6 sections of fencing, head back to the Commander.

Now he wants you to check up on the guard at the Black Tower to the south. Go south until you reach the tower, and then climb up the 2 ladders to the top. You should find some Dwarf Remains in the corner; pick them up and bring them back to the Dwarf Commander. He'll now ask you to find the guard's son.

Dwarf Child & the Cannon

Head south back to the entrance of the Fishing Guild, and then go inside of the cave to the east. Search the crates in the room to the far northwest, until you find the Dwarf Child. He'll go back home, and you can now leave the cave by climbing over the Mud Pile at the entrance. Now go back to the Commander, who needs you to fix the Dwarf Cannon.

The Dwarf Commander gives you a Toolkit, which can be used to fix the cannon inside of the nearby shed. After inspecting the cannon for a second time, you'll be able to fix the separate parts that were broken. Sometimes you may need to try more than once to fix the parts, but I found that by fixing the Pipe, Axle, Shaft and Barrel in that order made it easier. Once it's fixed, talk to the Commander again.

Now the Dwarf Commander wants you to find out what the cannon shoots. Head to Ice Mountain, located just north of Falador, and talk to Nulodion. He can be found in a building near the entrance to the Dwarven Mines. He will give you some Notes and an Ammo Mold to bring back to the Commander to finish the quest.

Rewards

• 752 Crafting experience
• Nulodion will now sell you a Dwarf Multicannon for 750,000gp.
• Ability to smith Cannonballs (thanks Bboyjyoung)
• 1 Quest Point