Route: See Zaikhal, On top of the Tailor's building in the north.
There can be a bug with this Augmentation in that you may have to relog your character to see the 8th pack slot appear.
Lore & Dialog
Dumida bint Ruminre tells you, "I can teach you to organize your packs more efficiently so that you can carry a bit more than you would normally be able to. But you will have to hand me a blank augmentation gem first.
Dumida bint Ruminre tells you, "Visit Fiun Rehlyun on the Halaetan Islands if you do not already have an augmentation gem."
You give Dumida bint Ruminre Blank Augmentation Gem.
Dumida bint Ruminre tells you, "Use this gem to increase the number of packs that you can carry. But make sure you read the gem's inscription before you use it. I can't be held responsible for any long-lasting decisions you may mistakenly make."
Dumida bint Ruminre gives you Shadow of the Seventh Mule.
You allow Dumida bint Ruminre to examine your Shadow of the Seventh Mule.
Dumida bint Ruminre tells you, "I see you have already learned all that I can teach you. You will have to visit a different trainer if you wish to learn something else."