Latter was the main source of income for Tallinn also during the Middle Ages. But, as it is still unclear, also Saccalians and Oeselians have been regarded as Sosols.
Sossoliteks võidi neid nimetada seetõttu, et nad tegelesid soolakaubandusega. Viimane oli Tallinna põhiliseks sissetulekuallikaks ka keskajal.