61 equipment works out at 85 kilos, of a Dyak, 75 kilos. Unfortunately the river is too low and there are too many snags to permit of the plane being landed on the river opposite the proposed camp site. Men and stores (food for 3 months) had therefore to be landed on the low bank of a billabong and left to make a way from there to high ground. Booth took in a field radio set and stayed overnight to set it up and make test contact with Hollandia: The expedition is two or three days ahead of schedule so far as the Idenburg landing is concerned and apart from faulty field radio plants, things are generally very satisfactory indeed. June 29th. Plane made two flights to the Idenburg. Booth, who stayed at the Idenburg, relates how, during the night, two alarms were caused by the guards firing (according to Teerink) at crocodiles; shots being fired by the awakened soldiers. Probably through some misunderstanding Booth was left without food by the military party until the plane took him off this morning. Re-examined the open ferny slopes on the North side of the bay and made some pic- tures with the big camera. I still think these ferny slopes are the result of clearing by natives. Considerable patches had been burned since my visit a few days ago. A thick growth of young Acacia Simsii follows severe burning of the fern. Mature Acacia scrubs are practically destitute of ground vegetation except for a thin scattering of wire grass (Griachne?) 8881. The next stage towards grassland is probably an almost pure growth of Eschaernym 8815. Themeda might follow this: but I did not see a single plant of this grass although, a few miles South on Jautefa Bay, it dominates the open slopes. June 30th. Plane took two more loads to the Idenburg. Some of the Dyaks air-sick. With my two Dyaks Ait and Leyong, I made a long trip up the slopes of the Cyclops