Lihir Pre-History and Regional Trade Routes
Papua New Guinea and Australia were originally linked up by land up until about 6,000 years ago. As the last Ice Age ended and ocean levels rose, the waters of Pacific and Indian Oceans poured through the Torres Straights and cut off the Australian continent from the world’s second largest island. Human remains have been found in PNG which have been dated to about 50,000 years ago. It is most likely that these ancient inhabitants originated from Southeast Asia. Complex agricultural systems involving culverts and drainage dated to around 10,000 years have also been found in the Kuk area near Mount Hagen.
A major migration of Austronesian speaking peoples came to the coastal regions of PNG roughly 3,200 years ago, which correlated with the introduction of pottery, pigs, and certain fishing techniques. More recently, some 300 years ago, the sweet potato entered PNG from South America. The higher crop yields from sweet potato gardens radically transformed traditional agriculture, giving rise to a significant population increase in the Highlands. Little was known in the West about the island until the nineteenth century, although traders from Southeast Asia had been visiting New Guinea for as long as 5,000 years collecting bird of paradise plumes, and Spanish and Portuguese explorers had encountered it as early as the sixteenth century.
The diversity of cultures and languages is one of the most distinctive traits of PNG. Some 850 languages are spoken throughout the nation. This comprises around one third of all languages on earth! Many of these languages evolved within PNG but they are generally classified into two groups: Austronesian and non-Austronesian, or Papuan. The more recent languages to arrive in PNG are from the Austronesian family, a grouping that also encompasses the languages of Indonesia, the Philippines and the rest of the Pacific island countries. Austronesian languages are found among the Motu people near Port Moresby, around Lae and in Manus, and in most of New Britain and New Ireland. However, in the Highlands, in pockets of the southern mainland coast and half of the northern coastline there exist hundreds of other, and presumably older, non-Austronesian languages
Lapita Pottery Example
It is most likely that Lihir was settled during this second wave of colonisation with, or subsequent to, Lapita around 3,200 years ago. This is because the Lapita Cultural Complex includes agricultural technology including gardening and domesticated pigs, dogs and chickens. On an island the size of Lihir it is likely that only agriculture could have provided adequate nutrition to support a viable long-term population.
In more recent times (500 years), pottery was also traded/exchanged in the region. Archaeologists have noted the movement of pottery north from Malasang village in Buka. There were a series of trade/exchange partners linking Buka to Nissan, to Anir to Namatanai & Tanga to Lihir & New Ireland and Tabar. Given the presence of Buka ware (style) pottery on Anir it is highly likely that it was brought to Lihir as well. This suggests a southern trade/exchange connection for Lihirians. 
Obsidian Fish Hook
Trade Routes
On the basis of the obsidian and pottery evidence it is highly likely that Lihirians traded/exchanged with neighbours to the north, south and west to New Ireland.
These trade and exchange partnership linked Lihirians to other New Irelanders through complex relationships of mutual obligation. Many of these exchanges occurred within the context of large-scale mortuary feasting, or funeral rituals. Lihirians maintained the closest trade/exchange relationships with New Irelanders from the Namatanai district on mainland New Ireland, the islands of Tanga to the South East, and the islands of Tabar to the North West.Archaeological studies have identified aspects of trade/exchange throughout New Ireland as early as 20,000 years ago. The most useful dataset for determining the antiquity of this phenomenon is obsidian. Prior to 3,200 years ago the majority of obsidian brought into New Ireland came from the West New Britain sources at Talasea and inland at Mopir. After 3,200 years ago the dominant source is Manus.
Trade Routes
If Lihir was colonised at or after 3,200 years ago it might be expected that much of the obsidian found throughout the group is derived from Manus. This suggests that the dominant trade/exchange connections for obsidian in Lihir come from the north. However, obsidian is not the only material known to have been transported throughout the region in the past.
Modern History: 1600s
The first recorded sighting of the Lihir Islands was in 1616 by Dutch explorers Jacob Le Maire and William Cornelisz Schouten. The islands were first named Gerrit de Nijs Eylandt by another Dutchman Abel Janzoon Tasman in 1643 when he navigated through New Guinea onboard the Heemskerck.
An artist onboard named Isaac Gilseman sketched the first image of the Lihir, as well as the famous image of northern New Ireland men in canoe.
New Irelanders in Canoe by as seen by Isaac Gilseman in 1643
Lihir as seen by Isaac Gilseman in 1643