For one hundred years, God had held to his promise, and the colonists had as well. When the first Puritans sailed into Massachusetts in the seventeenth century, weak from the ocean journey, they formed a covenant with each other and with God to establish a city on a hill-a commitment to live uncorrupted lives together or all suffer divine wrath for their collective sin. But now, a century later, the arrival of one doomed ship would put this covenant to its greatest test. On April 22, 1721, the HMS Seahorse arrived in Boston from the West Indies, carrying goods, cargo, and, unbeknownst to its crew, a deadly virus. Soon, a smallpox epidemic had broken out in Boston, causing hundreds of deaths and panic across the city. The clergy, including the famed Cotton Mather, turned to their standard form of defense against disease: fasting and prayer.
