Tasman’s expedition was conducted under comprehensive written instructions, and all decisions were taken with reference to these instructions. Tasman didn’t have sole charge of the expedition; he was the president of the ships’ council, on which he held the casting vote.
Their instructions included details on how to proceed when encountering new land, and the method by which they should lay claim to it.
“All continents and islands, which you shall discover, touch at and set foot on, you will take possession of on behalf of Their High Mightinesses the States General of the United-Provinces, the which in uninhabited regions or in such countries as have no sovereign, may be done by erecting a memorial-stone or ...
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