It doesn't really show in his expression, but Geddoe's pretty amused. After all, he'd been standing right there the entire time, yet apparently completely overlooked in that regard. In any case, he does take the chickens he's handed; he could take more, of course, but given the complicated way Lucius is holding it all, it might well be more difficult to offer more than to just take it himself at this point.

"All right."

Time to head back upstairs, then! Which is exactly the same way as it was on the way down. There's not much more to see, though; while another passage or room or two in the basement certainly exists, one would have to go past the stairs to get a proper look. And Geddoe, at least, is heading straight back for the kitchen.