Prologue.
He had not planned to see Harry off. He had expected them to apparate back to London but after breakfast Harry told him Mr Weasley had decided they would take the train. Harry had not said so explicitly but it was clear that Mr Weasley had realised that Hermione was in no state to apparate.
So Severus had transformed back into a moth and perched discreetly on a window ledge at Gottingen station. He watched his adopted son, the former Master of the Elder Wand, help Arthur Weasley with the luggage whilst his best friend Ron guided a ghost like Hermione Granger onto the train. Sadden though he was by the loss of her, she had never really been his. She would turn back to her original love and in time he would become just an interesting interlude prior to her marriage.
It was Harry he watched load the bags on the train, double check the tickets and buy coffee at the stand on the platform. His son's eyes scoured the station and Severus noticed that his shoulders lost some of their tension when they lighted on the window ledge.
Potter sipped his coffee, picked up a free newspaper from the stand and jumped on the train. He paused for a moment before slamming the train door, his hand gave a gentle, discreet salute and then he was gone.
