A tree had fallen across the stream, with its head resting upon the opposite bank, and this natural bridge was entirely covered with pink, blue, and white flowers of the waxy orchid. This beautiful sight, however, was unnoticed by Harry and his father, for in the water at their feet was the object of their search, the Lattice or Lace leaf. [Illustration: MADAGASCAN DRINKING-CUP FORMED FROM A LEAF OF THE "TRAVELER'S TREE."] The lace-leaf plant, or fresh-water yam as it is sometimes called because of its potato-shaped or yam-like root, is found in many of the rivers of Madagascar. The difficulty of obtaining it, however, makes it a rare plant to Europeans; and when, a few days before, Mr. Steedman had recognized in some "roasted potatoes," as Harry called the pleasant-tasting vegetable that one of his boyish Madagascan friends had given him to eat, the edible root of the lace-leaf plant, the missionary had determined to make a careful search for the plant so prized by naturalists. And now at last he had found it, bobbing backward and forward in a fantastic dance just above the eddying waters of the beautiful forest river. As soon as they recognized it, both Mr. Steedman and his son were on the ground in an instant, and bending eagerly above the clear stream. The water was so pure and limpid that every pebble could be counted, and in the cool, bright current they saw, to their delight, a perfect labyrinth of lace-work. Dozens of lace-leaves, green, gold, olive, and brown, were floating just beneath the surface of the water. "Oh, Papa! did you ever see anything so lovely?" said Harry, excitedly. Mr. Steedman could take but a one-sided view of those wonderful leaves, as one glass from his spectacles had been lost during their rough journey; but the remaining glass fairly sparkled with satisfaction. "Ah, my son, this plant is both lovely and rare. See, the young leaves are light green and yellow; the older leaves are darker,--shades of green and olive. A few are even black, and all growing from the same root. How perfect is every leaf, in spite of its delicate texture! Some of those larger leaves must be ten or twelve inches long. The strong midrib in each serves as a support for the fragile threads forming the meshes on each side." Harry now plunged his hand into the lace-like web, half expecting it to dissolve in his grasp. But no! The wiry little yellow leaf which he raised from the water, was perfect in form, and a gleam of sunlight, falling upon the shining meshes, transformed them into threads of glistening gold. He now discovered, as he examined them carefully, that the under surfaces of the leaves, were glistening with little pearly bubbles of air. [Illustration: RAHEH, THE GUIDE.] "Oh, Papa," he cried, joyously holding the glistening meshes aloft, "the lace-leaves are jeweled!" "Yes, Harry," said his father, "those diamond drops are made by the breathing of the plant."