Entitled "Columbus in Sight of Land", this lowest value in the set was based on a painting by William Powell and was one of several to be engraved by Alfred Jones. This stamp was used primarily to pay postage on third-class mail. Because the images in the series were not based on the works of a single artist, Columbus's appearance changes dramatically between this stamp, where he is clean-shaven, and the 2¢ value, where he sports a full beard, despite the depicted events occurring only a day apart. The Columbian Issue, often known as simply the Columbians, is a set of 16 postage stamps issued by the United States to commemorate the World's Columbian Exposition held in Chicago during 1893. The engraved stamps were the first commemorative stamps issued by the United States, depicting various events during the career of Christopher Columbus and are presently much valued by collectors.