There seems to be considerable amount of evidence already compiled by Davies from previous journeys to Sumatra. The hair samples he found have been DNA tested and it was concluded as "unknown primate." That is the type of evidence we need in the field.
I first heard of the Orang-Pendek when I saw the Beast Hunter episode of it featuring Pat Spain. He and a wildlife photographer went deep into an area near a lake formed by an extinct volcano. Spain said it reminded him of the "Lost World." Sumatra may be one of the most beautiful places on Earth. As a developing researcher, I believe I can learn a lot from reading Davies book. I will be on Amazon soon. This is what he says.
“I have no doubt the Orang-Pendek exists. Over the years I have interviewed many witnesses who have seen this creature. In 2009 the CFZ expedition was fortunate to have an eyewitness ourselves in Dave Archer. And Sahar Didmus saw one pinned against a tree, before it scurried away from us into the jungle. The experience so moved Sahar that he burst into tears.” Adam continues: “Importantly, there has been a considerable body of scientific evidence that has been gathered to support the existence of the Orang-Pendek. For example, previous expeditions I have led, in 2001 and 2004, brought back both prints and hair samples. These were analyzed by various international experts, including Drs. Chivers, Meldrum andBrunner, who all came to the conclusion that they were from an ‘unknown primate.’”Pat Spain recently searched deep into Sumatra looking for the Orang-Pendek, which was featured on the National Geographic Show Beast Hunter. Spain included Jeremy Holden, a wildlife photographer, who had worked in Sumatra for over a decade and has deployed camera traps for over 150,000 hours of observation looking for the Orang-Pendek. None of his camera traps took an image of it, but he did get an image of the Sumatra rabbit that because of his image, took it off of the extinction list. That was great work. Holden speculated that the reason stealth cams have not recorded the primate is because they are placed on game trails. Rare animals may indeed avoid such areas and that is why they can maintain their security.