It was difficult to say if Zach's symptoms were getting worse. Such an appraisal would require a longer period of observation-- and more attentive observation, at that. However, Albus suspected it would have been an invasion of privacy to monitor him around the clock. The idea had occurred to Albus, of course, when sleep seemed particularly unachievable.
Either way, the fact remained that there were incapacitating symptoms that needed to be addressed. Albus wasn't completely sure whether or not Zach had been angling to elicit his assistance in the matter, but as soon as he had mentioned Gellert's involvement, there was no dampening Albus's sense of responsibility-- especially when it came to light that Albus had, in fact, been present in Lockewood when it was going on. For his own active culpability, Albus could determine little. All he knew was that Zach likely didn't know if Albus had known or not. Only two conclusions could follow: either Albus had known and concealed it from Zach, or he hadn't known and there was nothing to conceal. Neither was excusable.
So of course it had weighed on Albus's mind. If anything, oddly enough, he was grateful for the problem to dissect. He might have wished the problem was less to do with Gellert, but most of the time he managed to eliminate that factor from his considerations.
"The very question I had in mind myself, Mr. Smith," Albus replied, unfastening the button of his jack to lean forward and rest an elbow on his crossed knees. "You lost consciousness in the kitchen. I moved you here."