BANDJERMASIN, THE PRINCIPAL TOWN IN DUTCH BORNEO—NORTHWARD ALONG THE EAST COAST—BALIK PAPAN, AN OIL PRODUCING CENTRE—SAMARINDA—TANDJONG SELOR—THE SULTAN-UP THE KAYAN RIVERAN EXPEDITION INTO THE JUNGLE—FIRST IMPRESSIONS—RAPID CHANGE IN THE DENSENESS OF VEGETATION—ANIMAL LIFE—A STUBBORN FIGHTCHAPTER IV