Back in the summer of 1999, a visitor watching our sea lions swim past the pinniped tunnel at the Aquarium of the Pacific mentioned to me that she had taken a vacation up to Hearst Castle recently and while there had seen elephant seals resting on the beach. She noticed that a few had faded orange tags on their flippers and that one of the seals had a tag that read 3709. The number sounded familiar so I looked it up in my records. It was quite a revelation. The seal that the woman saw on the beach was “Mac”, an elephant seal that I helped track by satellite two years before. I thought it might be cool to share with everyone the details of Mac’s voyage that year.