At some point I was part of a conversation in a book where people wanted to know the name of a story where Merlin found an egg, called it egberta, and immediately regrets it when it hatched. The others in the conversation wanted to know what it was called, and I found it. It’s The Call, in Magic and Mayhem, a Merlin one shot book. Unfortunately I don’t remember where the conversation was, so if anyone from that conversation follows me, here you go.