They were led into thick forest , but the Biami disappeared and Attenborough saw no further sign of them .
The explorers offered salt , which was traded for food , and indicated they would like to meet more of the tribe .
explorers were led into thick forest , but the Biami disappeared and Attenborough saw no further sign of them .
The explorers offered salt , which was traded for food , and indicated they would like to meet more of the tribe .