With the amount of all-subject information increasing worldwide by about 30% each year, it is difficult to find the time to learn the lessons of the past. But the past can be revealing; as DAVID WATKINS suggests here in a stroll through postcards' memory lane. Postcards ― after stamps and coins ― form the basis of the third most popular collecting hobby in the world. And little wonder ― postcards provide a captivating window on history and, for some, an opportunity to indulge in a little nostalgia.
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