Roland had studied the data on the first four cartridges for a very long time, when he realized that the lamprey was hiding a fifth inside it's mouth. Discovered, the lamprey wheezed and sputtered, blowing air through the cartridge in an attempt to make it sound out a tune. Confused and frustrated, it spat the item out into the sand and disappeared into the vast, toxic lake. Roland dried it off, inserted it into the DMG, pressed start and heard the growling waveforms emerge. This sound brought to him the realization that a year had passed in this wasteland and there was now much work to be done.
As Roland walked on through the desolation, he was acutely aware that he had lost something intangible. His only clues came to him by way of the DMG in his pocket. The lamprey was willing, for the moment, to help him search the debris for the small cartridges that fit into the DMG, each one supplying a new, crucial piece of information. The hidden truth would be thus revealed to him slowly, in sequence.