TheCodeBreakers
O.
Westland Row, addresser, Martha Clifford, c/o P.O. Dolphin's Barn: the
transliterated name and address of the addresser of the 3 letters in
reversed alphabetic boustrephodontic punctuated quadrilinear
cryptogram (vowels suppressed) N.IGS./WI.UU.OX/ W.OKS.MH/Y.IM: . ..."
"Quadrilinear" meant to set the cipher in four lines; "reversed alphabetic"
indicated the key of a = z, b = Y, etc.; "boustrephodontic," an adjective
concocted from the adjective "boustrephodon," a technical term in
paleography referring to writing that runs left and right in alternate lines,
indicating that the lines of the cryptogram were to be read in that way.
Unfortunately, Joyce or Bloom forgot about this in the fourth line, which
incorrectly reads left to right. The cryptogram and its solution thus are:
N . I G s .m a r t h a
wd
I . U U . O X
r o f file
W . O K S . M H
dolphin s
Y
annaabi.ee 
