On our return to our old lodging-house near Kaburau I spent a week making ethnological collections from the Kayan, who brought me a surprising number, keeping me busy from early until late. Before continuing my journey up the river I decided to go down to Tandjong Selor in order to buy necessary provisions and safely dispose of my collections. The Kayans were glad to provide prahus, the keelless boats which are used by both Dayak and Malay. The prahu, even the largest size, is formed from a dugout, and to the edge on either side are lashed two boards, one above and overlapping the other. This is accomplished by threading rattan through numerous small holes. As these are not completely filled by the rattan, they are plugged with fibre and calked with damar to prevent leakage. In order to travel more comfortably we lashed a prahu at either side of mine, while many of the natives who took advantage of the occasion to visit the shops in town, tied theirs at the rear of ours. It was a gay flotilla that proceeded down the river, the Dayaks singing most of the time, especially the women who accompanied their husbands, a number of them sitting in my large but crowded prahu. The women never seemed to grow tired of the Mae Lu Long, a jolly song which I had several times heard them singing when returning from the fields in the evening. Its words are of a language called Bungkok. The Kenyahs have the same song, and when I sang it to the Penihings on the Upper Mahakam they also understood it. These Kayans (Segai) are able to sing in the following six dialects or languages: Bungkok, Tekená, Siudalong, Siupanvei, Lepói, and Lui Lui. [Musical notation: KAYAN WOMEN'S SONG (On returning from the fields) Lively. Mae lun long son dong min ma--i min kam lam (_Repeat_)] At times as they paddled along, the men would sing without words, but more impressively, a song which until recently was used when the Kayan returned to a kampong from a successful head-hunting expedition. Though the Dutch authorities evidently have stamped out headhunting on the Kayan River, and have even destroyed the heads that were hanging in the houses, smashing them throwing them into the river, the Kayan still speaks of the custom in the present tense. Even one or two of my companions were credited with having taken part in such expeditions.