the mailman delivered your package to my door, has he been recruited into Ashcroft's TIPS program, has he been reporting who I've been receiving letters from to a centralized FBI database? as a precaution, the next letter I write you will only be readable by interposition of fire: by mixing Ceruse with Gum Traganth, I will write with an ink as white as paper. when you recieve it, hold a candle in front of the page and you will be able to read the letters by casting them as shadows. as I extrude these black phantoms onto paper in penning the penumbral this writing becomes a sciagraphy perhaps arrows as messengers--folding the letter around the foot of an arrow and shooting it into appointed place--would be more expedient. or we might more securely send our messages with guns: encasing the missive in molten lead and shooting the 'bullet', for the receiver to melt its integument in gentle fire or Quicksilver, carefully leaving the paper untouched-- we could kill two birds with one stone by shooting an enemy and retrieving the 'bullet' from his innards to read its message next