Dwarf Cannon

Start
You start quest by teleporting to fishing guild and run northwest tuntil you see Captain Lawgof. He will invite you to  Balck guard dwarf clan but first you have to complete his task for you.



Walkthrough
Head south-east back to fishing guild and near that locates a cave. Go inside the cave and look for the notes that Captain Lawgof wanted you to bring for him. When you enter the cave run northwest until you find alot of crates, then search the crate that is marked on the screenshot. When you have got the notes then return to Captain Lawgof.



Now you must bring him toolkit from Goblin Village what is located north of Falador and east of Taverley. When you reach to Goblin village go in house what is located west of the village. In that house there's a sack what you need to search, after that you get toolkit. When you got it head back to Captain Lawgof. Talk to Captain and he ask you to repair the broken cannon, when you have repaired the cannon talk to Captain Lawgof again. But this is not the end of the quest.

Now the captain ask you to find Nulodions son, head to Dwarven Mines where Nulodion locates. When you talk with Nulodion you ask where did he saw hes son last time, so the Nulodion said "fishing guild". You're next task is to go to Fishing Guild, locate Nulodion son.