When I worked for the National Bank of Kenya in Nairobi as a vocational employee in 1973 before proceeding to the University of Nairobi, I noticed that every 24th of the month (which was the traditional payday for bank employees) there were these Arab traders, known as Washihiri, hanging around the bank premises on their motorbikes (the Suzuki B 120 was the popular choice) and every so often a member of staff would dash outside and hold a short conversation with the traders and hand something over.
The same traders would be seen at other establishments at the end of the month and a similar exchange would take place.
