Which are blackish by reason of the ice, [and] wherein the snow is hid:
Ver. 16. Which are blackish by reason of the ice] Or frost, a black frost we call it, which deceiveth those that tread upon it. Or if, hard enough to bear up passengers, it promise to be a storehouse of preserving snow and water against the scorching time of summer, yet there is no trusting to it; for these waters, as they are in winter locked up with frosts, so they will be in summer exhaled and dried up by the sun.