Which preposition to use with incase

in Occurrences 15%

It was rather difficult for her to navigate on land, as her legs were incased in a fish's tail, but, seizing her comb and mirror, she managed to wriggle down to the water's edge.

with Occurrences 3%

When the trees are incased with ice, which, though not impenetrable by their strong bills, prevents their laying hold of the bark with their claws for support, they are in some danger of starving.

within Occurrences 2%

The third division of the organ is the internal ear, which is called the labyrinth; it is divided into the vestibule, three semicircular canals, and the cochlea: the whole are incased within the petrous portion of the temporal bone.

Which preposition to use with  incase