Morrowind:Master Index (quest)

Quick Walkthrough
#Speak to Folms Mirel at the Caldera Mages Guild.
#Seek out each of the 10 propylon indices in order and return them to him.

Detailed Walkthrough
:"Folms Mirel tells you how to find the ten propylon indices. In return for all ten propylon indices, Folms Mirel offers to make you a single Master Index. With this Master Index, the player can travel to any propylon chamber, or return to Caldera Mages Guild from any propylon chamber." —Official Summary
Once you install the plugin, seek out Folms Mirel at the Guild of Mages in Caldera, and ask him about "work". He will send you out after each of the ten Propylon Indices, offering 500 gold for each of them. You must give them to him in the following order (see the propylon indices article for more details, and a map)

Hlormaren
This one is easy – it's right in Caldera. You can purchase it from Irgola the Pawnbroker for 500 gold (adjusted by Mercantile skill), or if you're stealthy enough, just swipe it off of the windowsill behind him.

Marandus
This one can be found on the floor of a storage room in the basement of Vivec's St. Olms Temple, behind a   door. It's not owned by anyone, so nobody will care if they witness you grabbing it. The tricky part is it's hiding between some crates, and very hard to see. (There are also two rats in here, but that's not a big deal.) Note that it is not inside the named St. Olms Storage room in the depths of the St. Olms Canalworks; it is inside the temple itself, accessible from the Plaza.

Falasmaryon
This index can be found as an offering at the Shrine in Maar Gan. It is owned by Salen Ravel, who can be found in one of the downstairs offices to the left of the shrine. He will sell it to you for 500 gold (adjusted by Mercantile), or you can just grab it from the shrine if you have the skill.

Valenvaryon
This one is found in the Wise Woman's Yurt in the Urshilaku Camp. It is owned by Nibani Maesa, who will sell it to you for a much lower price of 25 gold (adjusted by Mercantile). You could steal this one as well, it's on the table in the yurt. But given its lower price, and the severe consequences that angering Nibani Maesa would have on the Main Quest, you'd be best advised just to pay for it this time.

Indoranyon
This one is very easy – it's sitting on the table next to Divayth Fyr in Tel Fyr. He will not mind at all if you take it, so there is no need for stealth. Asking him about propylon index will not add the index to your inventory, contrary to his reaction.

Berandas
This index can be found in Baladas Demnevanni's chamber in Arvs-Drelen, Gnisis. It may be hard to see depending on your race, as it's on top of the right-hand bookshelf next to a book. Shorter Wood Elves and Bretons may have to jump to see it. Baladas does not mind if you take it, so you don't need to be sneaky. He will mind if you take some of the other things on the shelf, so be careful that you don't miss and grab the wrong thing – especially if you're playing a race that has to jump to see it; a short-term Levitate will be safer.

Andasreth
This one is found on the middle shelf of a bookshelf in the dome atop Hlormaren. It is technically owned by Brilnosu Llarys, but she's outside (or, depending on your actions, already dead), and won't see you taking it. The two Khajiit slaves in the room won't report you either. (You can also set them free with the key in the chest to the right of the door.)

Rotheran
This one is being carried by Rols Ienith, who can be found in the Communal Hut at Rotheran itself. He won't give it up without a fight, but fortunately, he's already hostile, so you don't have to worry about committing a crime when you kill him.

Falensarano
This is a tricky one to find. It is near a skeletal corpse in an alcove in the ceiling of the Forgotten Galleries in the Shrine of Maelkashishi. You will need Levitate to reach it. This cell has two entrances. The easiest way to find the index is to enter from the higher of the two, and then look upwards across the gap to a platform with two pillars going to the ceiling; that is where the index is. Don't miss the Daedric Long Bow next to it, as well as a handful of Daedric Arrows both here and stuck in the pillar near the upper entrance, and another on the floor by that entrance.

Telasero
The last index is found inside Telasero itself, in a treasure trough in the Lower Level (which Folms Mirel refers to as a "troth"). Telasero is a dangerous place filled with Ash Creatures, so be prepared for a fight, and bring along some form of Cure Blight Disease.

Completion
Once you bring the final index to Folms Mirel, he will give you a special Master Index. From now on, if you have the Master Index in your inventory, you can speak to him any time you want to be transported to any of the ten Dunmer strongholds. Additionally, so long as you keep the Master Index in your inventory, touching any of the Propylon Pylons will instantly transport you directly to the Caldera Guild of Mages, which gives you quick access to any of the other strongholds, as well as to the other four Mages Guild branches via the Guild Guide.

Notes
You can download the quest  . The plugin also comes with the GOG Game of the Year Edition.
It is possible to find all of the propylon indices yourself without starting this quest or even installing the plugin. One advantage of this is that they can be used as a quick means of transport across Vvardenfell during the Silent Pilgrimage quest. With the Master Index, you would only be able to get as far as Caldera via propylon, since you cannot talk to Folms Mirel or anyone else for any reason without failing the quest.
Even with the plugin, you may wish to find all ten indices before starting Mirel's quest, since you will be able to use them in the interim, rather than surrendering them with no benefit until all ten are found.
If you want to, and have already found any of the indices prior to starting Mirel's quest, you can give them to Mirel straight-away when he gets to them. (They must be given in the order he asks for them.)
The Master Index is worth 2000 gold and is 3.0 units in weight, greater than the 2.0 of the individual Indices, but still much less than the total for all 10 of them.
One minor change made by this plugin is that Nibani Maesa and Salen Ravel have had their services changed such that they will now buy and sell Miscellaneous items. Additionally, the Valenvaryon index has had its value reduced from 500 to 25 to make Nibani offer it for a lower price.
Once you give an Index to Mirel, it is gone. You cannot get it back by pickpocketing or killing him. If you do kill him after completing the quest, the Master Index will still work to transport you to Caldera, but you won't be able to travel from there to any of the other strongholds anymore.

Quest Stages