A few hours after this interesting rencontre, the French expedition crossed the boundary-line of the kingdom of Luang Prabang, and reached the extremity of the great rapid of Keng Sao. Successfully steering their course through its rocks and islets, they arrived at Pak Lay, a romantically-situated village, buried in the deep shadows of the primeval forest. To the north of the village, and almost hidden by the trees, is situated a small pagoda, entirely deficient in the accessory buildings which usually surround a temple at Laos, but better placed for the purpose of assisting the self-absorption of its priests and votaries. [Illustration: PAGODA AT PAK LAY.] * * * * * As the voyagers proceeded up the river, they now began to notice a gradual change in the character alike of the inhabitants and the vegetation. The calcareous mountains which dominated over the river-valley assumed the most irregular and fantastic forms, and forced it into a constant succession of broken curves and sharp angular turns. At times a mass of marble suddenly projected its high precipitous cliffs, which the river bathed with waters sometimes foaming, sometimes tranquil. ~FISHING-STATIONS.~ The Mekong was not at its full height at the time our voyagers ascended it: a great part of its bed lay bare; and a person, on landing, before he could reach the bank had to traverse wide spans rugged with rocks. Here and there spread immense sandbanks, on which were erected large fishing-stations--veritable towns of bamboo--already abandoned by the fishermen in anticipation of the quick-coming rise of the waters. For three days the expedition continued its course. Not a single hut was visible anywhere. The only incidents of their voyage were the rapids, which occurred at intervals of three or four miles. These, for the most part, were formed by the shingle and rocks accumulated at their mouth by the numerous streamlets which the river here receives. By dint of vigorous exertions, the native boatmen “poled” their light barks through each swift current. At times the scene was illuminated by the arrowy flashes of a storm-swept sky; and peals of thunder, resounding among the mountains in multitudinous reverberations, mingled with the roar of the waters. Hail frequently fell in heavy showers during these gales, which lasted usually about half an hour, and abruptly lowered the temperature four or five degrees. The river’s course was remarkably direct, and lay almost due north. At certain points it completely filled its bed; its breadth was then reduced to about one hundred and fifty yards; and the hills which bordered it were of so regular an appearance that the stream assumed all the features of an artificial canal. A series of miniature cascades flashed their silver spray in all directions, as they descended the verdurous slopes. * * * * * ~MODERN CAPITAL OF LAOS.~ ~A PICTURESQUE SCENE.~