Great King Darius Great King Darius
Couriers deliver diplomatic correspondence, messages or packages, but the term may refer to a tour guide if you are in Britain.
Couriers only come when they have messages to give you. There are messages for locations of word walls, inheritance from deceased friends, and important quests.
In a pre-mechanical and pre-electronic world, communication was by land and sea couriers. It therefore established river and sea transport for those cities near water, and for the others, post-houses which held relays of horses for couriers to use carrying messages. Of course these transportation routes also carried commercial and military traffic.
I think the answer you're looking for here is nervous tissue which carries action potentials, or nervous impulses, between the tissues and are central nervous system. However, from another point of view you could also consider the cardiovascular system as carrying hormonal messages throughout the body.
An axon.
The Bible is organized into two main sections: the Old Testament and the New Testament. Each section is further divided into books, chapters, and verses. This structure helps convey the teachings and messages effectively by presenting stories, laws, prophecies, and teachings in a clear and organized manner. The Bible uses various literary forms such as narratives, poetry, letters, and prophecies to communicate its messages to readers. The repetition of key themes and ideas throughout the text also helps reinforce the central teachings of the Bible.
a prediction of the reciever main idea
Nerves
chasquis
Systems for carrying mail and messages have existed for thousands of years, and include the Inca runners, Roman road system and simply carrying messages by ships. Formalization of the systems were usually driven by the government.
It was a dangerous job as it involved carrying messages from regimental headquarters to the front-line.
Nerve!