who inhabited parts of Somalia, Tchertcher and other areas in the Horn, also erected various tumuli. These masons are believed to have been ancestral to ethnic Somalis. In the 16th century, Duarte Barbosa noted that many ships from the Kingdom of Cambaya in modern-day India sailed to Mogadishu with cloth and spices, for which they in return received gold, wax and ivory. Barbosa also highlighted the abundance of meat, wheat, barley, horses, and fruit on the coastal markets, which generated enormous wealth for the merchants. Mogadishu, the center of a thriving textile industry known as toob benadir (specialized for the markets in Egypt, among other places), together with Merca and Barawa, also served as a transit stop for Swahili merchants from Mombasa and Malindi and for the gold trade from Kilwa. Jewish merchants from the Hormuz brought their Indian textile and fruit to the Somali coast in exchange for grain and wood. Trading relations were established with Malacca in the 15th century, with cloth, ambergris and porcelain being the main commodities of the trade. Giraffes, zebras and incense were exported to the Ming Empire of China, which established Somali merchants as leaders in the commerce between East Asia and the Horn. Hindu merchants from Surat and Southeast African merchants from Pate, seeking to bypass both the Portuguese India blockade ( and later the Omani interference), used the Somali ports of Merca and Barawa (which were out of the two powers' direct jurisdiction) to conduct their trade in safety and without interference. Early modern era and the scramble for Africa In the early modern period, successor states to the Adal Sultanate and Ajuran Sultanate began to flourish in Somalia. These included the Hiraab Imamate, the Sultanate of the Geledi (Gobroon dynasty), the Majeerteen Sultanate (Migiurtinia), and the Sultanate of Hobyo (Obbia). They continued the tradition of castle-building and seaborne trade established by previous Somali empires. Sultan Yusuf Mahamud Ibrahim, the third Sultan of the House of Gobroon, started the golden age of the Gobroon Dynasty. His army came out victorious during the Bardheere Jihad, which restored stability in the region and revitalized the East African ivory trade. He also received presents from and had cordial relations with the rulers of neighbouring and distant kingdoms such as the Omani, Witu and Yemeni Sultans. Sultan Ibrahim's son Ahmed Yusuf succeeded him and was one of the most important figures in 19th-century East Africa,