Cook's 'secret' instructions from George III:
Cook's Secret Instructions represent Britain’s first official
expressions of interest in Australia. They record the quest for
scientific discovery, combined with the desire to find exploitable
natural resources and to expand Britain's control of strategic trading
posts around the globe. The Instructions confidently assume that these
varied interests could be made compatible with a respect for the native
populations in those countries so identified.
The Secret Instructions provided that, in the event that he
found the Continent, he should chart its coasts, obtain information
about its people, cultivate their friendship and alliance, and annex any
convenient trading posts in the King’s name.
The underline below is 'cultivate friendship and alliance with them'. Nothing about invasion here!