Zacharias slept fairly well, all things considered, once he actually fell asleep. He ended up in a knot of blankets on the sofa, one arm draped over the side, and he slept, until morning.
It wasn't the sun or anything else that stirred him from sleep - it was the sound of stumbling and the sound of retching. Zacharias mumbled to himself as he awoke, taking a moment to recall why he was on the sofa and not in bed.
Merlin. Right.
Sitting up, he threw his legs over the side of the couch and got up, going into the bedroom, where the pungent scent of vomit greeted him. He glanced down where Merlin was huddled on the floor. "Oh good, you threw up on the floor," he said dryly, but without any malice. "Come on, you," he said then, going over to help Merlin up, and back to the bed. He picked up the potion he had left on the side of the bed. "Drink this. It will take care of most of the hangover."