Complex sentence: Muslim writers occasionally mention both Adulis and the nearby Dahlak Archipelago as places of exile, the evidence suggests that Axum maintained its access to the Red Sea, yet suffered a clear decline in fortunes from the seventh century onwards.
Split into simpler sentences: Muslim writers occasionally mention both Adulis and the nearby Dahlak Archipelago as places of exile. The evidence suggests that Axum maintained its access to the Red Sea, yet experienced a clear decline in its fortunes from the seventh century onwards.