NOTE: You're going to need a kaborite cluster. You will also need to be on the daily task Emergency Portal Repairs to access the required zone from the Overlook.
You will get a damaged relic in the mail about 14 earth days after you finish the preceding quest. (Note: The message does not seem to float to the top.) Examine a damaged relic with the note to get the quest.
If you used the clear mailbox command between finishing the last Quel'ule quest and when the mail should have been delivered, you DID delete the quest starter mail. However, once the 2 week timer expires, you can go talk to Tahar again, and he'll ask you if you received his mail. At that point you can say no, and he'll resend it (without the 2 week wait). So, when you're sure the 2 weeks has elapsed, go see what Tahar has to say.
Speak to Natasha, the mystic on Kerra Isle in Zone:The Sundered Frontier] at 1191, 42, 2244 . After a brief conversation you can choose the option to go into a trance and get teleported into A Spiritual Pocket.
You have 3 minutes to find Miragul's Notes. They are books on the table at -106, 1, 25 . The timer display disappears, but the timer does NOT stop. Be sure to leave before the mobs reaggro.
Scribe Miragul's collected notes on crafting and craft the Armoring Tongs. (Requires a kaborite cluster)