According to Pliny the Elder, a Roman writer and naturalist of the 1st century, the journey consisted of 65 stages divided by stops for camels and payment points for traders.
The capital cities of the kingdoms were important stopping places for merchants.4a They were charged high taxes or duties upon entry into the country. They also paid substantial fees for the services offered to them.
The archaeological sites of Wadi Dawkah, Shisr, Khor Rori and Al Baleed are an important testimony of the frankincense trade that has flourished in this region for centuries. Wadi Dawkah is one of the collection points, although in ancient times, when trade was at its peak, it was just one of many places in a vast area. From there, the frankincense was transported north by Shisr, the main step before entering the Rub Al Khali desert. To the south, there were two important ports for maritime trade: Al Baleed and Khor Rori