(_a_) The wearing and building power of the stream.
(_b_) The location and the strength of the current.
(_c_) The best places for fords and for bridges.
(_d_) The tributary streams and springs.
(_e_) The location of ravines in relation to the river.
(_f_) Caves or places where caves may have been or may
yet be formed.
(_g_) The nature of the soil and its adaptation to the
formation of caves.
(_h_) The parts of the neighboring land that would be
flooded first if the river overflowed its banks.
(_i_) The place in the river where a natural dam might
be formed.
(_j_) The place where an artificial dam might be built.
(_k_) Sites that would make good camping-places for
hunters.
(_l_) Places where the best stones for weapons can be
found.