as the title suggests, I'll post the number of secrets, treasures, skulls, Toorum's notes, spells and tomes (which grant permanent attributes) I've found so far in LoG in this thread!
Current state: COMPLETE
I've done this also with LoG2 in case you need some help there ---> viewtopic.php?f=20&t=7451
HOW TO USE THE COMPENDIUM


Items that I found by jumping into a pit are assigned to the level I 'landed' on, e.g. if I jumped into a pit on level 2 and found an item, it counts for level 3 (where it actually has been found)!
Same goes for items that I found after running up/down a secret staircase from/to a sublevel!
Due to increasing demand, I've also added the total number of secrets you are supposed to have found after completing a level, including pit jumps and backdoors (secret staircases leading back from and to a sublevel)!
STATISTICS
Levels complete

Secrets found:

Treasures found:

Toorum's notes found:

Iron doors opened:

LEVEL 1: Into the Dark
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 3
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 3
Treasures: 0
Skulls: 0
Spells: 2
Toorum's notes: 0
Tomes: 0
MAP :

LEVEL 2: Old Tunnels
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 6
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 9
Treasures: 1 (Golden Chalice)
Skulls: 1
Spells: 3
Toorum's notes: 0
Tomes: 0
MAP :

LEVEL 3: Pillars of Light
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 6
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 18
Treasures: 0
Skulls: 0
Spells: 1
Toorum's notes: 2
Tomes: 1 (Tome of Health)
MAP :

LEVEL 4: Archives
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 10
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 25
Treasures: 1 (Golden Deity Figure)
Skulls: 1
Spells: 2
Toorum's notes: 1
Tomes: 1 (Book of Infinite Wisdom)
MAP :

LEVEL 5: Hallways
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 7
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 32
Treasures: 0
Skulls: 0
Spells: 2
Toorum's notes: 1
Tomes: 0
MAP :

LEVEL 6: Trapped
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 10
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 44
Treasures: 0
Skulls: 0
Spells: 1
Toorum's notes: 1
Tomes: 1 (Tome of Fire)
MAP :

LEVEL 7: Ancient Chambers
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 8
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 53
Treasures: 1 (Crown of Kings)
Skulls: 1
Spells: 3
Toorum's notes: 3
Tomes: 0
MAP :

LEVEL 8: The Vault
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 9
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 59
Treasures: 1 (Golden Dragon)
Skulls: 1
Spells: 1
Toorum's notes: 1
Tomes: 0
MAP :

LEVEL 9: Goromorg Temple I
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 3
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 63
Treasures: 0
Skulls: 0
Spells: 1
Toorum's notes: 1
Tomes: 2 (Book of Infinite Wisdom, Book of Infinite Wisdom)
MAP :

LEVEL 10: Goromorg Temple II
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 5
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 69
Treasures: 0
Skulls: 0
Spells: 0
Toorum's notes: 6
Tomes: 0
MAP :

LEVEL 11: The Tomb
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 2
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 69
Treasures: 2 (Ancient Apparatus, Goromorg Miniature)
Skulls: 1
Spells: 0
Toorum's notes: 0
Tomes: 0
MAP :

LEVEL 12: The Prison
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 0
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 71
Treasures: 0
Skulls: 0
Spells: 0
Toorum's notes: 0
Tomes: 0
MAP :

LEVEL 13: The Cemetery
Total number of secrets ON this level ( but not necessarily accessable FROM this level ): 2
Total number of secrets AFTER SOLVING this level, INCLUDING pitjumps and backdoors: 71
Treasures: 1 (Globe of Tetharion)
Skulls: 0
Spells: 0
Toorum's notes: 0
Tomes: 0
MAP :

HAVE FUN,
PSY