Which preposition to use with lethal

of Occurrences 1%

Once that most fierce and lethal of tropic snakes, the giant lythra, came out of the jungle and all down the street, the central street of Nen, and none of the Wanderers moved away from him, but they all played sonorously on drums, as though he had been a person of much honour; and the snake moved through the midst of them and smote none.

to Occurrences 1%

But if they are not lethal to man, they take a heavy toll of horses, mules, and cattle.

Which preposition to use with  lethal