And rather than frighten me with it, rather than poison the family with it, he had simply kept it — a patient, loving man quietly holding a shield over a danger I never knew was there, for forty years, and then arranging, as he died, for the shield to pass into my hands at the exact moment I would need it.

I have tried, since, to imagine the weight of carrying that knowledge for forty years.

Every holiday dinner at which Shirley sat across the table, charming and warm.

Every family gathering, every anniversary, every ordinary Sunday.

All that time, Lawrence had known exactly what his sister had done and exactly what she was capable of, and he had said nothing, to me or to anyone, keeping the peace, keeping her secret, keeping the evidence — a man quietly standing guard for four decades over a threat the rest of us could not even see.

He never once let it sour him, or so I thought; he was always easy and affectionate with her in company.