[Backdated: Or, What Happened to the Typewriter]
No one could ever say that Percy didn't take full advantage of the typewriter. Its new permanent residence is on his office desk, and although it may not have the high tech connections of his laptop, it nonetheless thrills him to nigh instantaneously print his own deductions--not to mention the joy of typing on an actual typewriter.
He likes it so much, in fact, that his thank you note to Lucas is meticulously typed with it; furthermore, it is the first document he writes. The thank you note is placed into a sealed, unsigned envelope and slipped every so carefully into Lucas' mailbox downstairs.
It won't be the last hand-typed letter to his friend.