I know of no spot, easy of access, on the Isthmus where an idea of the beauty and the terror of the jungle can be better gained than on the lower Chagres. The stout green barrier comes flush to the water’s edge, the mangroves at places wading out on their stilt-like roots into the stream like a line of deployed skirmishers. That green wall looks light, beautiful, ethereal even, but lay your boat alongside it and essay to land. You will find it yielding indeed, but as impenetrable as a wall of adamant. It will receive you as gently as the liquid amber welcomes the fly, and hold you as inexorably in its beautiful embrace when you are once entrapped. The tender fern, the shrinking sensitive plant, the flowering shrub, the bending sapling, the sturdy and towering tree are all tied together by lithe, serpentine, gnarled and unbreakable vines which seem to spring from the ground and hang from the highest branches as well. There are not enough inches of ground to support the vegetation so it grows from the trees living literally on the air. Every green thing that can bear a thorn seems to have spines and prickers to tear the flesh, and to catch the clothing and hold the prisoner fast. Try it and you will see why no large mammals roam in the jungle; only the snakes and the lizards creeping down below the green tangle can attain large size and move. [Illustration: CHURCH AT CHAGRES Up the steep path in the foreground the buccaneers charged upon Fort Lorenzo] And how beautiful it all is! The green alone would be enough, but it is varied by the glowing orange poll of a lignum vitæ tree, the bright scarlet of the hibiscus, the purple of some lordly tree whose name the botanist will know but not the wayfarer. Color is in splotches on every side, from the wild flowers close to the river’s brink to great yellow blossoms on the tops of trees so tall that they tower over the forests like light-houses visible for miles around. Orchids in more delicate shades, orchids that would set Fifth Avenue agog, are here to be had for a few blows of a machete. It is a riot and a revel of color--as gay as the decorations of some ancient arena before the gladiatorial combats began. For life here is a steady battle too, a struggle between man and the jungle and woe to the man who invades the enemy’s country alone or strays far from the trail, shadowy and indistinct as that may be. “A man ought to be able to live quite a while lost in the jungle,” said a distinguished magazine writer who was with me on the upper Chagres once. We had been listening to our guide’s description of the game, and edible fruits in the forest.