Cipher Challenge
The Papal Nuncio's Brussels Letter
Introduction
A papal nuncio in Brussels sent this coded letter to Rome on 9 October 1721. The manuscript mixes mostly two-digit groups with nulls and a few four-digit nomenclature entries. Transcription and cryptanalysis, CC BY 4.0
1
01 16 05 14 6 1 58 06 14 77 2 03 61 45 9441 43 03 04 53 06 17
22
66 71 38 2 67 14 77 03 38 53 38 77 22 05 04 14 40 18 77 15 35 58
44
16 38 77 53 9336 9485 53 03 16 06 14 66 77 17 38 16 05 14 77 222
64
15 77 73 2 73 77 41 04 53 58 61 15 16 66 17 77 74 04 55 77 18 04 15
87
35 06 40 46 61 81 40 17 66 22 73 16 14 08 77 03 16 86 88 17 74 77
109
05 14 16 50 61 38 17 03 61 35 17 16 76 38 58 14 17 06 77 65 9356 77
131
46 06 66 75 16 58 16 14 41 22 17 38 05 61 66 47 66 03 04 15 16 73
153
77 14 16 06 61 15 04 66 03 17 04 14 17 74 77 03 03 04 66 46 16 17
175
38 60 16 71 61 14 46 17 66 71 65 18 04 88 61