Crack the Code!

This one will be a bit easier than most, because it has been made known to you that this message is a telegram. Therefore, the plaintext ends with "end of message." Also, it probably contains at least one copy of the word-pair "full stop", which serves as a period or end-of-sentence marker.

WARNING: This cryptogram contains at least one "fixed point". These are letters of plaintext that encrypt to themselves as ciphertext. (For example, J encrypts as J, or something like that.)

Good luck!

A :
B :
C :
D :
E :
F :
G :
H :
I :
J :
K :
L :
M :
N :
O :
P :
Q :
R :
S :
T :
U :
V :
W :
X :
Y :
Z :

Frequency Distribution of Ciphertext

 

Frequency Distribution of English

A joint project of Brendan Bard, Prof. Gregory Bard, and Prof. Seth Dutter, University of Wisconsin---Stout (January 30th, 2019)