THE HAWKEYE PEARL BUTTON CO., MUSCATINE, IOWA
This unpretentious cover was sent by William Lewis, Sydney to the Hawkeye Pearl Button Co., Muscatine, Iowa, U.S.A., and it has quite a story behind it. The blue 2½ d Roo on map of Australia stamp is postmarked with a roller cancel, SYDNEY/ DE 19/ 1917/ NOON/ N.S.W. (Figure 1). The making of buttons from mother of pearl was introduced into the United States about 1855, but at that time