t in House of Commons, 65. =Bib.=: _Dict. Nat. Biog._

=Ashburton Treaty.= Negotiated between Great Britain and the United
States, 1842, Lord Ashburton acting for the former and Daniel Webster on
behalf of the latter. Provided for the settlement of the international
boundary between Maine and Canada. Of the territory in dispute, the
United States got about seven-twelfths and Canada five-twelfths. Also
provided for the determination of the boundary in the St. Mary River
and thence to the Lake of the Woods; for the free navigation of the St.
John River; for the suppression of the slave trade, and for the
extradition of criminals. =Index=: =Sy= Sydenham takes part in
negotiations leading to, 336. =W= Boundary question settled by, 135. =T=
Settlement of, checks projected railway from St. Andrews to Quebec, 53.
=BL= Settlement of, 118. =Bib.=: Dent, _Last Forty Years_; Winsor,
_Narrative and Critical History,_ Vol. vii; White, _The Ashburton
Treaty_, in _Univ. Mag._, October, 1907; _The Ashburton Treaty: an
Afterword_, in _Univ. Mag._, December, 1908; Houston, _Canadian
Constitutional Documents_; Hertslet, _Treaties and Conventions_.

=Assembly.= _See_ House of Assembly.

=Assiniboia.= One of the provisional districts carved out of the
North-West Territories, in 1882. Now included in the provinces of
Alberta and Saskatchewan, principally in the latter.

=Assiniboine Indians.= A tribe of the Siouan family; first mentioned in
the Jesuit _Relation_ of 1640. They separated from the parent stock
early in the seventeenth century, and moved north and north-west to the
region about Lake Winnipeg. Later they spread over the country west of
Lake Winnipeg, to the foot-hills of the Rocky Mountains. Their
population was estimated at 8000 in 1829. One-half this number perished
in the smallpox epidemic of 1836. They are now settled on reservations
in Alberta, and in Montana. =Bib.=: Hodge, _Handbook of American
Indians_.

=Assiniboine River.= Discovered by La Verendrye in 1736. Fort Rouge was
built at the mouth of the river in that year, as well as Fort La Reine,
near the present city of Portage la Prairie. From the latter fort, two
years later, La Verendrye set forth on his memorable journey to the
Mandan Indians on the Missouri. Before the close of the century, both
the Hudson's Bay Company and the North West Company had trading
establishments at various points on the river. First named Riviere St.
Charles; afterwards Riviere des As