I honestly do not know what the “shaggy heart” reference means. Maybe that he’s like a mule? Wild-hearted? Courageous? Who knows?
BTW: Myrine (sometimes spelled Myrina) was an Amazon Warrior. She supposedly fought Atlanteans back in the day. This is an important reference because of the tradition that later in the Trojan War Penthesilea, an Amazon, shows up and fights Achilles.
Also: bird omens were a big deal back then. Etruscans were mad good at reading bird signs, but apparently some Greek dudes were pretty good at it too.
AND now we are done with Book 3. Huzzah! Only 21 left to go! Sunday we shall start in on Book 4.
Have a good Wednesday!