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In addition to the latitude of numerous points determined astronomically by the party engaged in surveying the line through the woods, the latitude of a point near the southern end of Green River and Kedgwick has been determined by eighty-six altitudes of sun and stars taken with a repeating and reflecting circle.
This survey therefore required but little correction, which was applied from the observations already cited and from those at two intermediate points. The survey of Kedgwick portage was performed with chain and compass.
During the year 1840 the commissioner proceeded in person by the wagansis of Grand River to the waters of the Bay of Chaleurs, ascended the Grande Fourche of the Restigouche to Lake Kedgwick, and then traversed the country from that lake to the Tuladi by a route never before explored.
The third was formed by the two first assistants, who, after performing the necessary astronomic observations at the Grand Falls and at two points on Green River, passed the surveying party and reached the portage between Green and Kedgwick rivers on the evening of the 13th July. Green River has a fall and rapids near its junction with the St. John, which are passed by a portage of 1-1/2 miles.
The portage from Green River to the South Branch of Kedgwick is 5-1/4 miles in length, and passes over the summits of two of the highest mountains in the ceded district, as well as several ridges. No vessel heavier than a birch canoe had ever before been carried over it. It therefore became necessary to clear it out before the bateaux and other heavy articles could be transported.
In the woods between the Bell Kedgwick and the boundary and along the whole line of survey the same method was used, observations for time and latitude being also taken whenever the weather permitted.
From the second fork of the lakes to the southern end of the Green River and Kedgwick portage the stream is very narrow and may be styled one continuous rapid. It is upon the whole the most difficult of navigation of all the streams running into the St. John from its northern side, and approaches in its character of a torrent to the waters on the St. Lawrence side of the highlands.
The plan for the work of the season was therefore laid as follows: To proceed up Green River with a party, thence to cross to the Bell Kedgwick by the portage, and having, by expeditions from the banks of that stream, surveyed the remainder of the claimed boundary, to fall down the stream to the Bay of Chaleurs, and, ascending the highland measured in 1840, to proceed along the heights in order to reach if possible the northwest angle of Nova Scotia.
The latitude of the south end of the Kedgwick portage as given by the plot of Green River on the original projection differed no more than 5" from that given by numerous astronomic observations, an agreement so close that it might be almost considered as arising from happy accident.
The engineers then set out on their return by the Bell Kedgwick, the Grande Fourche, and the Southwest Branch of Restigouche. Ascending the latter stream, this party reached the Wagansis portage on the 21st August, and arrived at the Grand Falls on the 25th August. The descent of the Bell Kedgwick was attended with great difficulties in consequence of the low state of the waters.
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