OCCOQUAN, Va. — On your next trip to Occoquan, you may see historic buildings and pretty scenes, but one thing you’re not going to see is the old Merchant’s Mill, which was once located in historic Occoquan. The mill burned down in 1924, but one resident of Occoquan, Dr. James Walbert, has found a way to revive the memory of Merchant’s Mill – he’s constructed a scale model of the mill for residents and tourists.