[ Severus knows what encryptions are now and is not fond of third party creepers. But after a significant delay in response, the privacy shift is going to seem especially pointless. Maybe. Or maybe it's just unfailingly indicative of his personality and temperament.
He takes the notes he needs to take. Most of them add up to 'science is incapable of explaining anything unless they can backwards engineer it with tiny machines'; he Apparates back and forth between his quarters and the science labs, considering. He finds the sketch he did for Gold of a Timer-Turner. He writes out the method for making one by hand on a board in his workroom - a many-year project, needing at least a coven of six. He erases it.
100% private, talilock.
He takes the notes he needs to take. Most of them add up to 'science is incapable of explaining anything unless they can backwards engineer it with tiny machines'; he Apparates back and forth between his quarters and the science labs, considering. He finds the sketch he did for Gold of a Timer-Turner. He writes out the method for making one by hand on a board in his workroom - a many-year project, needing at least a coven of six. He erases it.
Eventually, ]
Go the fuck to sleep, William.