The minister's schedule being what it is, I understand that a second meeting might take a while to organize, but we've got him for two hours, apparently, which is unusual, as I understand it, from past meetings, where ministers would ordinarily show up for an hour.
The other thing is that in the other committee that I'm on, the discussion itself led to a blending of both the estimates and the mandate letter. We transitioned back and forth between the two matters. With two hours to cover, you might even run out of questions.