Arthur glances at his gun on the ground, not willing to leave without it. He still has his knife pointed at Childermass, knowing he can throw it with decent accuracy, but the time it would take to pull back and then release it would open himself up for retaliation. He's not really looking to start a fight with these two - he's a human with a knife up against two powerful witches, he already knows how that will go.

Still, he's not leaving without that gun. Going for it would guarantee an attack on himself and maybe Eames as well, so he stays exactly where he is.

"I'm not going anywhere without my weapon. Give it back or leave first. Either way, you've already won this battle and we won't be coming back," he says firmly. Maybe speaking on Eames' behalf will keep him quiet. God knows the fae could get them both killed right now if he gives in to his more volatile instincts.