Oblivion:Fieldhouse Cave

Notes
This cave contains 46 Cairn Bolete plants and 27 Wisp Stalk plants.

 
Exterior

The exterior is located at coordinates: Tamriel 31, -26
This location's map marker (M on map) is named Fieldhouse Cave (editor name FieldhouseCaveMapMarker).  The entrance door is SSE of the marker, 30 feet away.
2 Wilderness Creatures (Swamp variety) are near the entrance
4 Nirnroots are at locations N on map
The following plants can be found near the entrance: 27 Clouded Funnel Cap plants, 85 Green Stain Cup plants, 8 Primrose plants, 5 Somnalius plants, 15 Stinkhorn plants, and 3 Pitcher Plants.

 

Zone 1:
thumb|right|188px|Fieldhouse Cave thumb|right|The alchemy store near the bedroll at 'b'
On the surface, and with only three zones, this Conjurer dungeon might seem like easy exploration, but it is in fact a huge and complex cave with multiple paths, levels, and plenty of enemies, so be prepared for a long trek. Upon entering from door Out, follow the path and choose the southern tunnel at the intersection which will lead you to the first alchemy lab and a minor loot chest. Backtrack and head west at the intersection then make your first choice out of many:
The southern tunnel leads you through another lab (with a bedroll at b) and provides two different entrances to the next zone; one of them (C) is accessed by jumping down a hole in the southeastern room and the other (D) is reached by ignoring the hole and proceed forward. Both doors basically land you in the same area of the next zone, Dust Sumps of Fieldhouse.
The western tunnel provides quick and easy access (E) to the many treasures of the third zone, Black Balconies of Fieldhouse and from there, you can explore the rest of the cave backwards.
Choosing door C or D makes for an even quicker and more convenient path to the third zone, via a nearby door in Dust Sumps of Fieldhouse. 
Make your choice and fight the many Conjurers and Daedra you encounter, and, if you are heading south, make sure to pick up any items you may need.

Occupants:
6 Conjurer Enemies (each 50% probability Conjurer, 50% Daedra)
Treasure:
2 Chests 02 (1 locked)
1 Chest 04
The following alchemy equipment will always be found: 5 Novice Alembics, 3 Novice Calcinators, 3 Novice Mortar & Pestles, and 13 Novice Retorts
The following books will always be found: 1 Mysticism and 1 The Argonian Account, Book 4
The following ingredients will always be found: 2 Apples, 2 Corns, and 2 Lettuces
The following plants will always be found: 15 Cairn Bolete plants and 6 Wisp Stalk plants
Some of the above items are clustered at the following locations:
At H: 1 Apple, 1 Mysticism, 1 Novice Alembic, 2 Novice Calcinators, 1 Novice Mortar & Pestle, and 6 Novice Retorts
At I: 2 Novice Alembics, 1 Novice Mortar & Pestle, and 4 Novice Retorts
Doors and Gates:
There are four doors in/out of this zone
1 door (at Out) leads outside
2 doors (at C and D) lead to the zone Dust Sumps of Fieldhouse
1 door (at E) leads to the zone Black Balconies of Fieldhouse
Other:
1 bedroll at location b on map

 
Zone 2:
thumb|right|269px|Dust Sumps of Fieldhouse
This zone is huge and parts of it are mildly confusing, so keep an eye on the map and make sure you have visited all tunnels and rooms. Upon arriving from Fieldhouse Cave through door C or D, notice that the southwestern door at F provides quick and easy access to the third zone, Black Balconies of Fieldhouse. For complete exploration, head east and choose the right path when you reach the fork, as it will save you some backtracking later on. Make your way through the tunnels and fight some minor opposition, until you reach a large room with a locked chest and several paths in all directions. Take a detour north and claim the contents of the chest in the tunnel, then backtrack to the room. Take the southeastern tunnel until you reach two tunnels in close vicinity, both leading west; a huge chamber with both upper- and lower levels is ahead, and the right tunnel leads to the upper-level, while the left path will land you on ground level. As the upper level contains absolutely nothing of interest, pick the left path and emerge in the large room. Take an immediate north and loot the chest, then locate the path leading west. The small room at the end contains a chest and a bedroll at b, so use it to your advantage, then exit the zone through door G, leading to Black Balconies of Fieldhouse.

Occupants:
12-14 Conjurer Enemies (each 50% probability Conjurer, 50% Daedra)
Treasure:
3 Chests 01 (1 locked)
2 Chests 02 (1 locked)
1 Chest 04
The following alchemy equipment will always be found: 2 Novice Alembics, 2 Novice Calcinators, and 4 Novice Retorts
The following books will always be found: 1 Mysticism
The following plants will always be found: 16 Cairn Bolete plants and 18 Wisp Stalk plants
Some of the above items are clustered at location H: 1 Mysticism, 1 Novice Alembic, 2 Novice Calcinators, and 4 Novice Retorts
Traps:
1 Pressure Plate trigger at location I on map
3 Rotten Plank traps at K
1 Swinging Log trap at J
Doors and Gates:
There are four doors in/out of this zone
2 doors (at C and D) lead to the zone Fieldhouse Cave
2 doors (at F and G) lead to the zone Black Balconies of Fieldhouse
Other:
1 bedroll at location b on map

 
Zone 3:
thumb|right|353px|Black Balconies of Fieldhouse
This third zone contains quite a bit of important treasure and is definitely worth exploring; it contains multiple entrances from both the first and second zones and, depending on your previous choices, you will arrive to the Black Balconies from either Fieldhouse Cave (door E) or from two possible entrances from Dust Sumps of Fieldhouse (door F or G). While the Black Balconies can be confusing at times, make your way to the large southeastern room, which is divided into two levels. Not much treasure can be found underground, so locate the northwestern tunnel leading up and make sure to raid the small room for a rare copy of The Seed and a hefty amount of gold. Once you are up on the ledges, locate the big entrance in the southeastern corner and prepare yourself for a boss-leveled Conjurer at A. Loot the boss chest at B, then jump down and head west, through the tunnel. Remember to turn left in the first small room, where you will find the Hand to Hand skill book Way of the Exposed Palm hidden under a Cairn Bolete plant. Finally, take the quickest way out, which happens to be door E, leading you right back to the first zone.  

Occupants:
1 boss-level Conjurer at location A on map
10 Conjurer Enemies (each 50% probability Conjurer, 50% Daedra)
Treasure:
1 boss-level Chest (Conjurer variety; locked) at location B on map
1 Hand to Hand Skill Book: Way of the Exposed Palm at H
1 Chest (contains The Seed, 25% chance 5 Soul Gems, 25% armor, 25% weapon, 10% potion)
1 Chest 02 (locked)
1 Chest 03
1 Chest 04
The following plants will always be found: 15 Cairn Bolete plants and 3 Wisp Stalk plants
Doors and Gates:
There are three doors in/out of this zone
1 door (at E) leads to the zone Fieldhouse Cave
2 doors (at F and G) lead to the zone Dust Sumps of Fieldhouse