Palm Beach, FLORIDA - The Jungle Trail - Bike-Powered Rolling Chair - 1915:  The Historic Jungle trail winds for nearly 8 miles along a sandy road through the hammock habitat of Florida's barrier islands north of Vero Beach. The trail—really a road—is on the National Register of Historic Places and was built in the 1920s so that citrus growers could haul their produce up and down the barrier island. Although cars do drive along the road, it's mostly used by cyclists, walkers and joggers. The road is sandy but mostly hard packed and easy going for wide-tire bicycles. Some places can get soft at times.  From the northern end point, the trail begins in Pelican Island National Wildlife Refuge, the nation's first wildlife refuge established in 1903 by Teddy Roosevelt to protect birds from feather hunters. Bird feathers were widely used to decorate women's hats in the early 20th century, and Florida's barrier islands were teeming with the most vulnerable of species.  This Divided Back Era postcard, mailed in 1915, features a couple in a rolling chair powered by a bicycle.  The card has edge wear with its lower left-hand corner is in good condition.  Pub. by J. F. Kirklon.  Palm Beach, Fla.