Here is 1 saying encoded using a letter for letter replacement:

IS EOM BXTUM WQ WSM OLSNGMN TSN BMRMSEH-BID HMTGB EOM VIBBIBBIXXI OTB
BOWGEMSMN IEBMCQ EPW OLSNGMN TSN QWGEH-EPW VICMB. EOMGMQWGM ... IS EOM WCN
BICLGITS XMGIWN EOM VIBBIBBIXXI GIRMG PTB LXPTGN WQ WSM VICCIWS EOGMM OLSNGMN
EOWLBTSN VICMB CWSK ... BMRMS OLSNGMN TSN QWGEH-EPW HMTGB QGWV SWP EOM
VIBBIBBIXXI PICC AM WSCH T VICM TSN EOGMM-ZLTGEMGB CWSK. ... EOMGM IB
BWVMEOISK QTBUISTEISK TAWLE BUIMSUM. WSM KMEB BLUO POWCMBWVM GMELGSB WQ
UWSYMUELGM WLE WQ BLUO T EGIQCISK ISRMBEVMSE WQ QTUE.
-- VTGF EPTIS