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Title Commissioner John Ogilvy letter to David Thompson
Date Jan. 18, 1817
Description 1 letter, 3 pages
People Thompson, David, 1770-1857
Ogilvy, John, d. 1819
Fraser, Donald
Search Terms International Boundary Commission
Fort Wellington (Prescott, Ont.)
Saint Lawrence River
Saint Regis River (N.Y.)
Iroquois River
Scope & Content Copy
Cote des Reigis 18th Jany 1817

Dear sir,
Conceiving it necessary for the purpose
of correctly establishing the line of division between Upper
Canada and the United States of America, tat the
geographical position of certain points or places on or
near the same should be ascertained.
I have to request you to proceed to St. Regis
and there as near as conveniently may be on the
line of 45° N. where this parallel of latitude shall
be found to touch or intersect the river Iroquois or
Cataragy make astronomical observations for deter-
mining the latitude and longitude of the said point or
place also the variation of the compass.
Having effected the necessary observations at
St. Regis you will then proceed to Fort Wellington
and there take another series of astronomical observations
for fixing the latitude and longitude of that place and
determining the variation of the compass. - After which
should the weather prove favorable it will be desir-
able to establish the latitude & longitude of a third
point on the river which if the occasion offers will be
notified to you.
In the course of your progress along the river
you may take a cursory sketch of its course noting as
particularly as you can the position of the islands and
if it can be effected without too much trouble you
will please measure with a chain the width of the
river at St. Regis
You will be pleased to keep a journal of your
proceedings with remarks of all extraordinary occurrances
and a diary of the weather with observations, You
must be attentive to keep your accounts minutive
in detail all your disbursements, And as the
original books must be any vouchers. I beg you

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p2 begins

to keep the whole in a neat and orderly manner
I leave to you the choice of the person you
may require as an Assistant in the present business
and having the fullest confidence in your discretion
and diligence, I authorize you to make all the
requisite arrangements for accomplishing the above
Should the state of the river be such as to
make it more convenient to commence your
operations at Fort Wellington than at St. Regis
you will exercise your judgment on that point.
Your draft on me at Mssr. J & D.P. Ross's
for the amount of your disbursements will be paid.
I am dear sir
Your &c
(signed) John Ogilvy

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Letter from W. Commr.
Ogilvy to David Thompson
Esquire 18th Jany 1817

Filed 20th May 1819
S. Sewell

I certify that the within and
above is a correct transcript from
a cpy in the possession of the
secretary of the board of Commiss-
ioners under the 6th & 7th Articles
of the Treaty of Ghent.
Donald Fraser
Ast Surv
Admin/Biographical History This compiled collection includes papers from Thomas Barclay (1753-1830), his son, Anthony Barclay (1792-1877), John Ogilvy (d. 1819), Ward Chipman (1754-1824), Ward Chipman, [Jr.] (1787-1851), David Thompson (1770-1857), Alexander Wadsworth Longfellow (1814-1901) and others related to the determination of the boundary between Canada and the United States. Materials include government documents, correspondence, maps, surveys, diaries and Indian deeds related to the determination of the boundary between Canada and the United States, particularly of the years of the St. Croix Commission, 1796-1812, the Commissions appointed after the Treaty of Ghent, 1814-1838, and the Commissions under the Treaty of Washington, 1842. Papers of diplomats appointed by the British and American governments include the correspondence of explorers who surveyed the boundary zones and of several other diplomats, political officers and aids who became involved in the arbitration of the border. The explorations around the Island of St. Croix by Robert Pagan and Native American Francis Joseph Neptune, and a map by Chief Wasp of the Ojibway tribe in the vicinity of Ontario and Minnesota are noteworthy.