What does John Thornton take with him on his quest to the Lost Cabin?

John Thornton takes salt and a rifle with him on his quest to the Lost Cabin, as these items are crucial for his survival and for the tasks he plans to undertake. The salt is necessary for preserving food, which is vital when embarking on such a long journey in the wilderness. Additionally, the rifle serves both as a means of protection against wild animals and as a tool for hunting, allowing him to secure fresh food during the expedition. This choice reflects Thornton's experience and understanding of the dangers and needs of wilderness exploration, emphasizing his survival skills in the harsh environment of the Yukon.