There's this book called Narrative of the Portuguese embassy to Abyssinia during the years 1520-1527 and it was written by a Portuguese visiting Ethiopia. When talking about Adal, he makes an offhand comment about Cape Guardafui (Raas Caseyr) and he mentions a ruler there that is subject to Adal. I've always suspected Migiurtinia to be much older than thought and this sort of proves it. Also this means the entire north was under Adal.