2.6 In one of his cases, Sherlock Holmes was confronted with the following message.
534 C2 13 127 36 31 4 17 21 41
DOUGLAS 109 293 5 37 BIRLSTONE
26 BIRLSTONE 9 127 171
Although Watson was puzzled, Holmes was able immediately to deduce the type of cipher. Can you?
 
 
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