Finding the HMS Terror meant the end of the expedition for Leonard and his team since the locals were already taking over the southern estuary, so they didn't need to go there to excavate.
However, in Leonard's memory, a large amount of evidence was found at the southern Baker River estuary ruins regarding the exploration team resorting to cannibalism. He felt it was best not to get involved in such matters as a foreigner.
After all, Europeans were reluctant to admit to such disgraceful and uncivilized facts, as they always considered themselves, as white people, civilized and others as barbaric. Cannibalism was an extremely barbaric act.
In Leonard's original world, when the native Inuit people informed explorers about the cannibalism, the whole of the United Kingdom disbelieved that cannibalism had broken out among the exploration team.