The "Erivan" Collection of Western Postal History

cornercard on cover from New York City to London, England, franked with pair of 2c Black (73) and pair of 10c Green (68), all tied cork cancels, pink all-over advertising on reverse for Idaho and Nevada silver and California and Canada gold, small repairs throughout, exploded for display, very fine appearance, a striking mining advertising cover 
 
exploded to show all-over design on reverse from the DeLery Gold Mining Company, franked with pair 2c Black and pair 10c Green, addressed to London, England