FOURTH OF JULY IN AN EMIGRANT PARTY—OPEN LETTER OF LANSFORD HASTINGS—GEORGE DONNER ELECTED CAPTAIN OF PARTY BOUND FOR CALIFORNIA—ENTERING THE GREAT DESERT—INSUFFICIENT SUPPLY OF FOOD—VOLUNTEERS COMMISSIONED BY MY FATHER TO HASTEN TO SUTTER'S FORT FOR RELIEF.BEWILDERING GUIDE BOARD—SOUL-TRYING STRUGGLES—FIRST SNOW—REED-SNYDER TRAGEDY—HARDCOOP'S FATE.CHAPTER V