He'd happened upon a packet in what he assumes is the foyer. It held the answers to all of his basic questions: where am I, how did I get here, how do I get home, etc. While those answers may have been discouraging to most, D'Artagnan just happens to come from a fortunate time in his life-- still entirely too confident in his own abilities, considering he's just saved the whole of France with his three best friends.
In any case, the only thing he hasn't done is figure out how to properly use his communication device. In fact, he doesn't even really know what it's for, just that it's a little black square that sometimes makes noises at him and shows him the faces of other people, who he assumes live in this place with him. He hasn't spoken to a single one, too busy with investigating all that he can.
D'Artagnan walks down a corridor on the first floor, passing through a doorway and smiling widely at the sight behind it. He's found the kitchen, it seems, finally, and Christ, is he hungry. He's still a growing boy, after all.
He raids the cabinets-- pleased to find them well-stocked with everything he loves-- and sets himself down at the table in the corner, his communicator falling to the floor with a slight crack!
He leans over, frowning at it, unaware that it's started broadcasting.]
Huh. At least it's not broken.