Harry had swooped to pick up the shawl at the same moment as the young lady, and so it was only when he straightened up, his fingers leaving the fabric, that he saw and recognised her. "Ah, Lady Gwendolyn!" He smiled, "But I should have expected to see you here, of course. What social gathering is complete without you?" Clearly she'd wanted a drink, why else would she have come to the punch table, but her shawl had distracted her, and so, personifying gentlemanly behaviour, just as he was meant to at these sorts of gatherings, he took a clean glass and filled it for her as she re-arranged her garment.