SUMMARY OF ACTIVITIES OF INLAND COLLECTING PARTY by A. L. Rand The expedition was organized thusly. Base camp was established at Hollandia between May 23, when Mr. Brass first arrived, and June 17, when the last of the party arrived. Airplane reconnaissance flights were made over the proposed area in June, during which notes were made on the country, the camp sites on the Idenburg chosen and the route between that and Habbema Lake surveyed and photographed from the air. Lieut. van Arcken and his party of soldiers and carriers, with 90 days food, were flown to the Idenburg camp, June 28 to July 1. This camp was called Bernhard Camp, because it was founded on Prince Bernhard's birth- day. Lieut. van Arcken then started the Dyaks making canoes to take the party down the river in case of accident to the plane. At the same time he started to cut a track toward Habbema Lake, to a point on the Balim River chosen as a meeting place with Capt. Teerink, on the reconnaissance flights. He met Capt. Teerink there August 13 and arrived back at the Idenburg River August 20, having flown back by the plane from Archbold Lake. From then until the end of the year, except for a trip by plane to Habbema, van Arcken spent on the Idenburg slope, mapping the country and preparing col- lecting camps and a track to them from Bernhard Camp. The collect- ing party and Capt. Teerink, with three months food, were flown to Lake Habbema July 20-31. The next day Capt. Teerink left for the arranged meeting place with van Arcken on the Balim River, to open up the inner half of the track between Lake Habbema and the Idenburg, to be used as an emergency exit for the whole party in case of accident to the plane. Capt. Teerink met van Arcken August 13, then