Found another note but it is a bit hard to decrypt, especially the part about the method used , maybe I try that later :
:. B E T W E E N S U B T L E S H A N O I S U L Q I F O E C N
A U N E H T S E I L T H G I L F O E C N E S B A E H T D N A G N I D
. B E T W E E N S U B T L E S H A S I U Q L O N I F O E C N
A U N E H T S E I L T H G I L F O E C S B A N E E H T D N A G N I D