In 1993 the Royal Mail in Great Britain issued a set of five se-tenant stamps to honor the legendary fictional detective Sherlock Holmes.  The stamps depicted iconic scenes from The Reigate Squire, The Hound of the Bask...

In the era before Express Mail or Special Delivery, the Swedes and Finns used feathers affixed to mail by a royal seal to indicate a "need for speed." These Fjäderbrev were in use from the mid-eighteenth century until...