172 PHYSICAL GEOGRAPHY. 



St. Croix river in Maine to St. Regis on the St. Lawrence river, may be 

 found in the state Ubrary at Concord, which was prepared from very 

 elaborate surveys after instructions from Major J. D. Graham, of the 

 United States topographical engineers, principal astronomer, who acted 

 under the direction of congress. Two stations along the New Hamp- 

 shire boundary were determined astronomically by Major Graham. One 

 of these is situated at the extreme east point of Vermont, on the west 

 side of HaU's stream, having the latitude of 45° o' 17" .58, and the 

 longitude west from Greenwich of 71" 30' 34" .5. The other is about 

 half a mile N. 10° W. from Lake Sophy, or Third Connecticut lake, 

 having the latitude of 45° 14' S^" .06, and the longitude west of 

 Greenwich of 71° 12' 57". Distances and bearings were measured care- 

 fully by chaining and triangulation. The trigonometrical work seems to 

 have been performed under the guidance of different engineers, — all east 

 of Mt. Prospect, an azimuth station about half a mile north-west from 

 the small Fourth lake, having been under the direction of Lieuts. 

 Emory and Raynolds, of the U. S. topographical engineers, while that 

 on the west was surveyed by A. W. and S. Longfellow, civil engineers. 

 In brief, the line may be described as following the water-shed between 

 the St. Francis and Connecticut rivers, from a point at the junction of 

 Maine, New Hampshire, and Quebec province, to the head of the main 

 Hall's stream ; thence down Hall's stream to the first named astronomi- 

 cal station of Major Graham. It is hence often styled the "highland 

 boundary." 



More particularly, the boundary may be thus described : The point to 

 which the three territories converge is known as " Crown monument," or 

 No. 474, from the first at the head of the St. Croix river, and appears to 

 be in latitude 45° 18' 23" .33 ; longitude 71° 5' 40" .5. This is on high 

 land, and the country descends to the next post, or No. 475. Monuments 

 are located at most of the prominent elevations and depressions, as the 

 line is traced westward. Monuments 474 to 477 lie along the head waters 

 of the Magalloway {Margalloway, as spelled by the commissioners and 

 Carrigain's map). No. 478 seems to be situated upon rising ground not 

 specially connected with either stream ; but from No. 478 to No. 484, we 

 travel along the Httle streams discharging into the valley of Lake Sophy. 

 The whole of the Perry stream basin lies between Nos. 484 and 485, 



