He was a star in the Arab world back then. His job was to emigrate from one country to another and meet new people to know the news and stories those countries and others. He was as like the media before the invention of radio and television.
Before the radar there was a job called The Listener at the army. His job was to hear the voices of enemy planes before they arrives using a very basic equipment.
Knocker-uppers were basically human alarm clocks. They used to walking down streets calling for people and knocking doors to wake them up for their business.