After just a couple of days, Lith's body couldn't take the training regimen anymore, not with just three meals a day. He couldn't explain to them that thanks to Invigoration his body required but a second to regain his vigor, so he accessed Soluspedia to relieve his boredom.
Only then did he notice that his mental library was completely empty except for a scroll. It said: "If you can read this, eject the scroll inside the tower."
The moment Lith did as instructed, two more scrolls appeared inside Soluspedia.
The first said: "If you are alright, eject this scroll" while the second: "If they are holding you prisoner against your will, eject this scroll".
'Solus, you are a damn genius.' Lith smiled while ejecting the first scroll and continuing their long-distance conversation.