er; _thence_ down along the middle of that river to
the forty-fifth degree of north latitude; from thence by a line due west
on said latitude until it strikes the river Iroquois, or Cataraquy;
thence along the middle of said river into Lake Ontario; through the
middle of said lake until it strikes the communication by water between
that lake and Lake Brie; thence along the middle of said communication
into Lake Erie through the middle of said lake until it arrives at the
water communication between that lake and Lake Huron; thence along the
middle of said water communication into the Lake Huron; thence through
the middle of said lake to the water communication between that lake and
Lake Superior; thence through Lake Superior northward of the Isles Royal
and Phelipeaux to the Long Lake; thence through the middle of said Long
Lake and the water communication between it and the Lake of the Woods to
the said Lake of the Woods; thence through the said lake to the most
northwestern point thereof, and from thence on a due west course to the
river Mississippi; thence by a line to be drawn along the middle of the
said river Mississippi until it shall intersect the northernmost part of
the thirty-first degree of north latitude; south by a line to be drawn
due east from the determination of the line last mentioned in the
latitude of 31 deg. north of the equator to the middle of the river
Apalachicola, or Catahouche; thence along the middle thereof to its
junction with the Flint River; thence straight to the head of St. Marys
River, and thence down along the middle of St. Marys River to the
Atlantic Ocean; east _by a line to be drawn along the middle of the
river St. Croix from its mouth in the Bay of Fundy to its source_ and
from its source _directly north_ to the aforesaid highlands which divide
the rivers that fall into the Atlantic Ocean from those which fall into
the river St. Lawrence; comprehending all islands within 20 leagues of
any part of the shores of the United States and lying between lines to
be drawn due east from the points where the aforesaid boundaries between
Nova Scotia on the one part and East Florida on the other shall
respectively touch the Bay of Fundy and the Atlantic Ocean, excepting
such islands as now are or heretofore have been within the limits of
the said Province of Nova Scotia."

So far as the present question is concerned, five points of discussion
are presented by this article of the treaty of 178