The book unveils documents and museum collections related to research and excavations conducted on the Red Sea coast and at Adulis in the 19th and 20th centuries. In examining these materials the author takes the opportunity to discuss the place of Adulis and of the Eritrean coast in the cultural, social and political background of the Northern Horn of Africa from the latest centuries BC to the 7th century AD, so as their place in the Red Sea maritime trade network linking the Mediterranean to the Indian Ocean.