START FOR ST. PETERSBURG ROUTE TO YAKUTSK—A TUNGUSE ENCAMPMENT— CROSSING THE STANAVOI MOUNTAINS—SEVERE COLD—FIRE-LIGHTED SMOKE PILLARS—ARRIVAL IN YAKUTSKTHE GREATEST HORSE-EXPRESS SERVICE IN THE WORLD—EQUIPMENT FOR THE ROAD—A SIBERIAN "SEND-OFF"—POST TRAVEL ON THE ICE—BROKEN SLEEP—DRIVING INTO AN AIR-HOLE—REPAIRING DAMAGES—FIRST SIGHT OF IRKUTSKCHAPTER XL