In Turn-of-the-Century America, wish you were here was an often-penned phrase used on the backs of postcards that had been purchased for a few pennies and mailed with a one-cent stamp. The picture postcard craze produced countless thousands of images from everyday life -- new schools, crowded main streets, storefronts and interiors, fields of harvest, churches, families, trains, resort spas, fires, and floods. The examples presented here -- taken...