White Knight Spy

Starting
To start, go to Falador Park and speak to Sir Tiffy Cashien.
 * Tiffy: Ah, hello there player.
 * Player: Is there any way I could help the White Knights?
 * Tiffy: In fact, there is. Our spies have noticed there has been increasing activity involving the Black Knights. We fear they may have a new plot. I need you to spy on them.
 * Player: Sure, where do I start.?
 * Tiffy: One of our Knights has noticed that a Black Knight patrol near Port Sarim. Take them out and then pick up their armor.
 * Player: Will do.

The Patrol
Go to Port Sarim and travel to the altar there. Close by there will be four Black Knights, all Level 33. While this may be an easy fight it is a multicombat area so they all will attack you. Using a Dwarf Multicannon should make this fight easy. Once done, pick up their army. You should now have a Broken Black Platebody, a Broken Black Legs, and a Broken Black Full Helm. With these in your inventory go back to Falador and speak to Sir Tiffy.
 * Tiffy: Is the deed done?
 * Player: Yes, here