The use of a code to transmit messages was primarily driven by making the message shorter, due to the expense of sending a telegram. Especially if you were sending messages across the Atlantic, each word in a telegram could cost the equivalent of several dollars per word.
From the late 1800's into the mid 1900's, there were a large variety of codes available. Some were general-purpose codes like this one, others were focused on certain industries. There were also the military and diplomatic codes that common in that period as well.
As you look at this code, remember you are dealing with a document from 1880. Due to the nature of this code, there are some (not many) places in the main code that would be controversial today. The main exception is that the list of products and commodities lists a number of items such as lion skins or tobacco whose sale we discourage or forbid today. The age and origin also shows up in a few other places, for example the spelling "to-day" is used consistently.
Another thing to remember is that there are a number of terms such as "demurrage" or "general average" that have a technical meaning in the area of commerce or insurance. You can look up definitions for those terms on the Internet.
Why did codes disappear? Here are some of my ideas:
When you are in the process of encoding a message, the top part of the page will look something like the following: (Note: In this example, only the navigation buttons are active, and the message is fixed).
The parts of the page have the following meanings:
The book includes an example of encoding messages on page vii. Here is my own example of encoding and decoding messages.
Suppose we want to send a message: "The goods ordered on August 10th have not arrived, tell me why."
we can start by looking for phrases related to orders or goods, and there are two phrases that are applicable to this situation:
|198||9851||Outpouring||Order(s) not yet to hand|
|133||6611||Gloominess||Goods not yet to hand|
If we think about synonyms and other words that might be helpful, we can find two more possibilities under the term shipment.
|265||13243||Sniveller||What has become of the shipment per|
|266||13280||Socratique||The shipment(s) of —|
It may seem that coming up with the possible alternatives may be difficult, especially since there is no search button, but remember that if you are frequently sending and receiving coded messages, you would quickly learn where to find things, especially those phrases that apply to your area of business (Think of how easy it is to remember the various abbreviations we use in text messages or chat rooms).
Finishing the message (in less detail), we can use the phrases
|28||1390||Assume||10th day of August|
|115||5704||Expert||Should like to have explanation|
So assembling the message as "What has become of the shipment of August 10th, the
goods are not at hand, I would like to have an explanation." we could encode it
SNIVELLER ASSUME GLOOMINESS EXPERT
A few notes:
If we (for some reason) wanted to send code numbers rather than code words, the
message would become (adding leading 0's so all numbers are five digits):
13243 01390 06611 05704
Another example: After the sinking of the Titanic, J Bruce Ismay, the Managing Director of the White Star Line
sent the following telegram from the Carpathia to the office in New York: "Deeply regret to advise you
Titanic sank this morning after collision with iceberg, resulting in serious loss of life.
Full particulars later, Ismay".
If we wanted to send this message using this code, the message might be encoded as:
INCULCATE TITANIC COACH SULTANSHIP MUDFISH LUMBAGO PARADOXY ISMAY
Which is equivalent to "Very grieved to inform you/Titanic/Has been in collision with an iceberg/Sunk at sea/This morning/Great loss of life/Further particulars will be sent soon as possible by telegraph/Ismay".
Suppose we receive the message:
GENTLENESS RABAISSER BATTLE CREEK ARABISM THOMPSON TOLLBOOTH TREACLE
Take each of the code words, and look it up in the code book. The code words are in sorted order for the vocabulary section, and then separate areas for the addenda and various tables in Part II of the book. Looking each word up, we find:
|133||6530||Gentleness||Can you go|
|Battle Creek||(Proper name, not a valid code word)|
|25||1218||Arabism||Await arrival of —|
|Thompson||(Proper name, not a valid code word)|
|288||14374||Tollbooth||Three o'clock, P.M.|
So this message is asking to go to the train station at Battle Creek, and meet Thompson, who should be arriving on the 3:00 train.
If we get a message using numbers, the process is again similar to handling code words, but actually a little easier since the code numbers are in strict order throughout the book.
My home page