Dustin makes a mental note of their location before he settles into a kneel on the ground, with the apparent intent of waiting for the Queen to come to him. It might save some time to come here directly when he next needs to speak with them - and he's sure he will - but he can't be certain that the Queen actually lives in the walls of this specific building, or if it's just a protected corridor to somewhere even more secure. The chances of him figuring that out without provoking suspicion, retaliation, or both are slim.