This lot consists of a group of vintage advertising sample envelopes produced for King's Castle Flour by the H.H. King Flour Mills Company of Minneapolis, Minnesota. Each piece is constructed from a small white cloth bag attached to a printed paper promotional flap. The front of each cloth bag features a multi-colored graphic depicting a medieval castle with red roofs and yellow walls situated on a green hill. The brand name is printed in bold red and green serif lettering as KING'S CASTLE FLOUR, with the manufacturer's name H.H. King Flour Mills Co. Minneapolis, Minn. appearing below. The attached paper flaps serve as promotional mailers or hand-outs. Three of the flaps are addressed Dear Madam: and offer a FREE SAMPLE with the punning slogan A friend you knead. These flaps include a space intended for a local grocer's name. The fourth flap features different text, emphasizing a SPECIAL INTRODUCTORY PRICE and noting that the envelope contains recipes for two dishes and a specific quantity of flour. The items represent the mid-20th-century marketing practices of the Minneapolis flour milling industry.