Lucius knew before even halfway waking that it wasn't yet morning, but the bed was empty beside him already.
He debated his current ability to go back to sleep, and reluctantly admitted it wasn't going to happen. Lucius groaned and threw aside the eiderdown, sliding his feet to the floor and looking around for his erstwhile spouse.
Severus was nowhere in the room, however, and Lucius sighed, shrugging into a silk robe. He realised as he stepped out into the corridor that the robe was slightly too long for him, and black, not mist blue, but wasn't troubled enough to return for his own.
Sleep-fogged and not particularly worried, Lucius didn't bother casting a spell or asking the Manor's wards for Severus' location, just headed towards the study, as the likeliest possibility.
With no immediate results, Lucius continued wandering the Manor, yawning periodically, and was somehow not surprised when he finally found Severus. In the potions workroom with only a single, guttering candle, still trying to read his notes by its light.
"Come to bed, love." Lucius coaxed, stroking Severus' shoulder and wincing at how chilled he was. "You're too tired to make sense of it now, in any case."
Happy Halloween! (and NaNoWriMo-eve, of course)
