1847 / Book or monograph
A Code of Signals ... in the Merchant Service
Communication, telegraphy and codes · Navigation, seamanship and maritime practice
271 pages Open documentOpening preserved document…
On the same shelf.
Related subjects
[pref. 1909] / Dictionary, handbook or reference work
Bentley's complete phrase code (nearly 1000 million combinations) with at least 2 letters difference between each half-code word)
Communication, telegraphy and codes
356 pages Open document
Undated / Book or monograph
Histoire de la télégraphie
Communication, telegraphy and codes
283 pages Open documentSource record
Bibliographic identity checked against available scan and source evidence.
Digitizing archive catalogue
https://archive.org/details/internationalcod00grea
File and catalogue details
obscure/international-code-signals-1873.pdf
SHA-256: 1ab9290614a93a3a772c8fe2ea244deda962d2d3a81b4847d50d57a88df1f88b
Catalogue reviewed 19 September 2026. Original scans retained; catalogue labels do not endorse historical claims.