No signature, no more details. Whoever this Alicorn thought was coming never did. They didn’t take the cube. Lucky did, tucking it away along with the note in one of the many pouches on her back. Looks like you ponies have holographic storage medium too. Cracking whatever compression or encryption they used was going to be no mean feat, Lucky knew. But the Forerunner was smart, and it had time. It would figure it out eventually.