Evidence
It looks like trouble is brewing in Sakhmet, with all of the main Neopian rulers invited by Princess Amira to a meeting, someone has crept into the palace and stolen items from each of the distinguished guests.
Each day a new clue will be released to help you determine who stole each item.
It seems that it doesn't matter which option you choose when trying to get the clue, with each option resulting in the character giving up their clue.
August 8th - Clue 1
The following clue is found at Lost Desert Foods:

The Illuminated Menuscript was either stolen using invisibility or by bribing a guard.
August 9th - Clue 2
The following clue is found at Osiri's Pottery:

The Oasis Runners stole an item sometime before the guild who bribed a guard.
August 10th - Clue 3
The following clue is found in a Neomail:

Of the guild that used distraction and the Sun Chasers, one stole the Wedding Ring and the other committed the theft at 5:00 a.m.
See the Neomail »
August 11th - Clue 4
The following clue is found at The Lost Desert Colouring Pages :

The guild that climbed the palace walls committed the theft sometime after the Wedding Ring was stolen.
August 12th - Clue 5
The following clue is found at Sakhmet Solitaire:

Of the guild that bribed a guard and the Pyramid Prowlers, one stole Pocket Chess and the other committed the theft at midnight.
August 13th - Clue 6
The following clue is found at Sakhmet Battle Supplies:

Neither the guild that committed the theft at 3:00 a.m. nor the guild that bribed a guard stole the Magical Blue Amulet.
August 14th - Clue 7
The following clue is found in a Neomail:

The Royal Telescope was not stolen at 3:00 a.m., nor was it stolen by the Desert Scarabs.
See the Neomail »
August 15th - Clue 8
The following clue is found at Scarab 21:

The guild that used invisibility committed the theft one hour before the Dagger Clan.
August 16th - Clue 9
The following clue is found at Cheat:

Pocket Chess was not stolen by the Sun Chasers, nor was it stolen at 2:00 a.m.
August 17th - Clue 10
The following clue is found at Cool Desert Paint Brushes:

The guild that committed the theft at 1:00 a.m. did not use a disguise.
August 18th - Clue 11
The following clue is found in a Neomail:

The Illuminated Menuscript was stolen by the Pyramid Prowlers.
See the Neomail »
August 19th - Clue 12
The following clue is found at Scratchcard Kiosk:

The Hand of the Anubis committed the theft one hour after the guild that used a disguise.
August 20th - Clue 13
The following clue is found in a Neomail:

The Grand Speech Scroll was either stolen at 4:00 a.m. or via the sewers.
See the Neomail »
August 21st - Clue 14
The following clue is found at The Neopets Fruit Machine:

The guild that used the sewers committed the theft sometime after the Royal Telescope was stolen.
Logic Grid
Need a place to put all of the information contained in the clues? Then check out our logic grid:
Our logic grid has been discontinued!
If you have a jnAccount, you can save your grid and come back to it each day to update. (Don't have an account? Register!) You can also use the grid as a guest--it just won't be saved when you next visit.
What We Know
Here's a compilation of all the whos, whats, and whens we know so far:
Items Stolen
- Illuminated Menuscript
- Wedding Ring
- Pocket Chess
- Magical Blue Amulet
- Royal Telescope
- Grand Speech Scroll
The Guilds/Thieves
- Oasis Runners
- Sun Chasers
- Pyramid Prowlers
- Desert Scarabs
- Dagger Clan
- Hand of Anubis
Times
- Midnight
- 1:00 am
- 2:00 am
- 3:00 am
- 4:00 am
- 5:00 am
Methods
- Bribing a guard
- Invisibility
- Distraction
- Climbed palace walls
- Disguise
- Via the sewers
Daily Prizes
After receiving each day's clue, you will be rewarded with a random Neopoint item, along with a Parchment Piece for the NC component. (For a full rundown of the NC component of Desert Diplomacy, check out our Desert Diplomacy Parchments guide.)