Message on the door knob
This message was Mr. Zipp's answer to Maddison's message. The message was tied on her doorknob.
Notes
There were two notes:
The First Note
This note was used to discover the passphrase ("Blind" - referring to Tom Wiggins - blind pianist and composer.) for use in the second note (see below)
The Second Note
Cpiayjplr - Cwwj Wdoxn - Sxoht bfzja ulp vatk - TB - Luugs!
Solution
This was solved by using the Vigenére Autokey<ref name=Vinegare>Vigenére Autokey</ref>. It is a tool which can encrypt or decrypt messages using the passphrase - some word that must be known by a person who wants to read encrypted message.
Passphrase for this message was Blind. Second part of the message refered to Tom Wiggins - blind pianist and composer. (see above)
The second note translated to:
Beanville - Holy Swamp - Above below the head - PU - Hurry!
(thanks to lg15panda)
It was solved as:
Beanville - Beantown - Boston Holy Swamp - Holy Marsh - Marsh Chapel on the Boston University campus
This message lead to the third drop in Marsh Chapel, Boston.
References
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