A map of three Arctic islands in Canada’s north, drafted by Norwegian explorer Otto Sverdrup, who discovered them, was thought to be in Canada’s national archives, after the government paid $67,000 to Sverdrup in 1930 for his diaries and maps of his expedition. But the map could not be found after an extensive search, and there’s now some question as to where it has since gone or even whether Canada received it in the first place. There is also a small but nonzero chance that it may affect Canada’s claim on these islands, but it’s rather unlikely that Norway would press it.

Previously: One of Our Maps Is Missing.