WOW Power Leveling: Take them back to Piken Square and sell the extras to other players
An NPC group of Ascalon Strikers will be in the Corridor. Use them to help you take WOW Power Leveling on the groups of Charr as you fight your way northeast to the altar.
The “Charr Altar” in the northeast corner of the zone is heavily guarded by Charr. Area-effect spells are very useful here due to the sheer number of Charr you’ll be able to hit with them; just be careful not to rack up a death penalty in the process.
Once you clear the Charr, clicking on the altar will give you “Althea’s Ashes.” Clicking it again, and again, and again will give additional copies until you run out of Barradin Family Urns.
Once you have plenty copies of the ashes, take them back to Piken Square and sell the extras to other players doing the quest. Once the ashes are in a customer’s inventory, his/her quest will update, and he/she will be able to complete it by talking to Barradin.
The typical going price at the time of this writing is 100-200g per urn of ashes.
Fire-based element lists can really rake in the cash here, since Charr are (oddly enough) somewhat vulnerable to fire. Here is a walkthrough for farming the beginning of the mission.