The lake begins to freeze in November, is completely ice-bound by the middle of December, remaining so for five months. The ice freezes to a thickness of nine feet, which would make sledge traffic perfect, were it not for the fact that wide fissures break its surface, which have a way of frequently closing up and piling the ice high into impassable windrows. These crevices have a width of three to six feet, and are often more than a verst in length, forming a serious impediment to progress on the ice and rendering next to impossible the marching of troops across the lake or the safe sledging of supplies. A thunderous crash, as of an explosion, marks the forming of the crevice, followed by a long, rolling reverberation. The rift instantly fills with water to the level of the ice, and is so agitated at the surface by currents or other forces that eight to fourteen days are required for it to freeze over, when the operation of cracking begins anew, and is repeated throughout the coldest portion of the winter. The obvious solution to this difficulty was to build a railroad round the end of the lake, a detour of nearly 150 miles, and necessitating the construction of four tunnels. This was out of the question. A powerful ice-crusher, the “Baikal,” modeled after the ice-crushers successfully used in the Straits of Mackinac, had been built. She could break ice four feet thick, but on the nine-foot ice of the Russian inland sea she made no successful impression. The result was that a line of track had to be laid across the lake, and that before this was completed the troops had to be marched across the forty-mile stretch of wind-swept ice, while their supplies and baggage had to be dragged after them in sledges. Many of the men, wandering on to treacherous ice, were drowned; many were frost-bitten, and all suffered extremely from the arduous labor of the march and the bitter cold. [Illustration: UNLOADING ARMY TRANSPORT WAGONS AT THE LAKE ] [Illustration: OFFICERS CROSSING THE ICE IN RUSSIAN SLEDGES ] [Illustration: DETACHMENT OF INFANTRY STOPPING FOR A MEAL OF HOT SOUP WHILE ON THE MARCH ] RUSSIANS CROSSING LAKE BAIKAL IN MIDWINTER [Illustration: RUSSIAN CAVALRY CROSSING LAKE BAIKAL ] [Illustration: RUSSIAN CAVALRY READY TO CROSS THE LAKE ] [Illustration: DRAGGING FREIGHT CARS ACROSS THE ICE ] [Illustration: MOUNTED COSSACKS AT LAKE BAIKAL ] WITH THE RUSSIAN FORCES ON THEIR WAY TO THE FRONT [Illustration: ARTILLERY CAISSONS AND SLEDGES ABOUT TO CROSS LAKE BAIKAL ] [Illustration: RUSSIAN SOLDIERS MARCHING ACROSS FROZEN LAKE BAIKAL ] [Illustration: RUSSIAN INFANTRY WARMING UP WITH HOT TEA BEFORE STARTING ACROSS LAKE BAIKAL ] [Illustration: A “PEKING CAR,” THE MOST LUXURIOUS METHOD OF TRAVELING ] [Illustration: TYPICAL RUSSIAN INFANTRYMEN IN HEAVY MARCHING ORDER ] [Illustration: DETACHMENT OF RUSSIAN INFANTRY ENTERING NEWCHWANG ] [Illustration: