I've seen a lot of death certificates over the years, but believe it or not this was the first time I ever saw "Visitation of God" listed as the official cause of death. My first inclination was to laugh hysterically, but a little research soon told me that the unusual cause of death wasn't quite as unique as I first thought. It was actually very common in the middle of the nineteenth century to attribute sudden unexplained deaths in this way - basically a fancy way of saying "natural causes."
If you find this interesting, you might be interested in exploring some of the historic causes of death found detailed in many online resources, including articles such as Decennial Cause of Death in England, 1851-1910 from the fascinating Web site A Vision of Britain Through Time. Or look up the unusual causes of death in one of these Old Disease Dictionaries.