Summarize this article in one sentence.
Soak the corn in the husks in a sink or a big pot in 4 to 6 inches (10.2 to 15.2 cm) of tap water for about an hour. Add enough coals for an hour of cooking. Cook for about an hour, turning occasionally, allowing the husks to char.  Serve immediately.

Summary:
Cut the tip of each ear of corn off. While they're soaking, prepare your outdoor charcoal grill. Place the corn still in the husks on the grill. Remove the husks. Add butter, salt and pepper to taste.