After establishing Fort McPherson, Northwest Territories, John Bell crossed the mountains into Yukon River watershed in 1845, and went down the Rat River (today the Bell River) to its confluence with the Porcupine River. After managing the fur trade at Fort McPherson, he returned to the Bell River, and followed the Porcupine to its juncture with Yukon River, the eventual site of Fort Yukon. Soon after, Alexander Hunter Murray established trading posts at Lapierre House (1846) and at Fort Yukon (1847) at the juncture of the Porcupine and Yukon Rivers. Murray drew numerous sketches of fur trade posts and of people and wrote the "Journal of Yukon, 1847–48", which give valuable insight into the culture of local Gwich’in First Nation people at the time.