Postcard from Duluth’s “Business Section” Paul Lundgren 4 years ago This undated postcard was never mailed, but at some point a message was scrawled on the back: This is the main street in the business section of Duluth. It runs in the low part of the city and follows more or less regularly the shore of the lake. Recommended Links:Postcard from Isle Royale, Lake Superior, Near DuluthPostcard from a Typical Lumber Camp in Northern MinnesotaPostcard from the Lyceum BuildingPostcard from the Steamer David Z. Norton