The goal, as Ed explained it, was to know these buildings so thoroughly—to have such a rich and textured set of associations with every corner of every room—that when it came time to learn some new body of information, I could speed through my palaces, scattering images as quickly as I could sketch them in my imagination. The better I knew the buildings, and the more each felt like home, the stickier my images would be, and the easier it would be to reconstruct them later.
