*It takes a while, but Sirius finally manages to double-check, and triple-check, and finally arrive at an answer. He puts everything away, and stands, ready to be thrown back or worse if he's miscalculated. But a bit of quick wandwork, and--there it is, a doorway sliced into the ward, outlined in crackling white energy. Sirius tightens his grip on his wand and moves through it, toward the house--and, it would seem, to whomever is sitting on the front steps.*