I got a question? Why did Jiraya needed to code the massage if it was urgent? The only reason usually you need to encode a massage if there someone on route and/or receiving end you don't trust. If Pain so Jiraya scribing something, he would kill him faster. So there was no reason to code massage at site. Shipping was secure as well so there was no reason to code massage for that. So there one thing left is village and Jiraya wanted Naruto and i believe Jiraya gave book to Kakashi before leaving. I wonder who defiantly wasn't suppose to be at site when massage was reviled?