For centuries, the Indian merchants brought large quantities of cinnamon from Sri Lanka and Indonesia to Somalia and Arabia. This is said to have been the best kept secret of the Somali and Gulf Arab merchants in their trade with the Roman and Greek world. The Romans and Greeks believed the source of cinnamon to have been the Somali peninsula, but in reality, the highly valued product was brought to Somalia by way of Indian ships. Through collusive agreement by Somali and Gulf Arab traders, Indian/Chinese cinnamon was also exported for far higher prices to North Africa, the Near East and Europe, which made the cinnamon trade a very profitable revenue generator, especially for the Somali merchants through whose hands large quantities were shipped across ancient sea and land routes.