Hundreds of sun-worshippers crowd a vast white strand under a pastel linen sky — this is Miami Beach at its mid-century apex, when the city was America's most glamorous winter escape and the hotels lining Collins Avenue were the places to be seen. The Tiehnor Gloss linen chrome hybrid, published by Harrison Photo Laboratories of Miami, captures the beach from an aerial vantage that makes the crowd feel almost festive in its density, umbrellas dotting the sand in red, orange, and blue. On the back, a sender — signing off as someone visiting "Miami, Fla." — wrote to a couple named Lacy and his wife at their home on S Perry St in Attica, Indiana, reporting on the weather and sights in flowing cursive, a personal dispatch that anchors this colorful scene in a specific January afternoon in 1956.