Below is the text you can read from within the message.
I know none of this makes sense to you now, but I have seen the alternative, and this information is very important and should not be forgotten, not idly revealed.
The code to what you seek is DIRAKS.
You must preserve the secret at all costs and make sure only the right people learn it. This will not be the only time the enemy will rise. The stonetoucher must also know what to do. The Temple Knights will be at the start of the stonetoucher's trial.
The animal is a cat.
The time is plus 2139.
Put the key to the secrets on your collar.
-Robert the Strong.
After completion of the associated quest, if you have unlocked the entire Hub track, this item can be retrieved from the Quest Item Storage chest at the Quest Point Caravan if lost or destroyed. Otherwise, a new one can be obtained from searching the wall again.
There is no need to keep this item after the quest has been completed. As such, it can be destroyed or kept as you desire.