This past Saturday, I spent the evening at a small party hosted by my colleague, Dr. Macdonald, at his new pastoral home, about an hour outside the city. During the course of the evening, obviously after exchanging pleasantries and congratulating him on his new domicile, I asked him what he was working on. He smiled cryptically and broke off the conversation, I thought I'd offended him, but yesterday he came into my office and dropped off a piece of paper containing only the following 24x15 grid of letters.
XPMAWWVXIQMXLMFETXPCYOLG
YYUMOVXPMVYMBPWCOAETWXBP
MPMBPQYIWRMWBDCGWMTQBSRC
KBWCRMMCFWCDDDDDIJKSTRAS
XBCWAEDDIGMCDEDWNNSWBEWQ
WFAAAAAWRBWWCBVEEIDMWVWP
MRFAXAWDSMWOBGIICMNFIONB
MEMDLOQHTPEDGGGGAYCLCRPP
XBDPCMRCWHBMHHGCLNBMCGPC
WEHWRCCEBBBBBCMCPBYWAKWO
WACXCUODEBOOAMJWEEWCNAAU
MCTWBWNBQRRACDCDTWDCOCCJ
VBCECMCIXWTEBDHYRANIBAAU
WAMMBCBWNCOCXAEIOUPMICJG
CAAECGDEEGACGDFCCAEBFDBB
What is he trying to tell me?
JI
toIJ
? Why not just edit the old one? $\endgroup$