ORINOCO IS TRACED TO SOURCE BY DICKEY; Party Follows River 100 Miles Beyond Known Extent to Peak in Northern Brazil. ATTEMPT EXPLORER'S FIFTH Fierce Heat, Bitter Cold, Hunger and Insect Attacks TestFortitude on Long Trek. Journey Took Five Weeks. Felt Extremes of Temperature. ORINOCO IS TRACED TO SOURCE BY DICKEY Animals Were Not Alarmed. Feared Cook Was Lost. Last Heard From June 12. Left New York April 1.
Dispatches from Upper Orinoco on