The survey of the great military road through the interior from Halifax, which was projected by government in 1844, formed a suitable opportunity for Sir James employing his skill in engineering; and he was accordingly engaged on a section of the undertaking. The road was designed to extend upwards of five hundred miles in length. Beginning at Halifax, it crossed Nova Scotia by Truro and Amherst; having arrived in New Brunswick, it pursued a pretty straight line by Boiestown and Lake Madawaska to the south bank of the St Lawrence, whence it went onward to Quebec. The main object of the line was to favour the transit of troops to Canada; but practically it would open new and vast regions for settlement, and greatly advance the prosperity of the colonies, New Brunswick in particular. Already a travelled road existed for a hundred miles or more at each end, and therefore the only trouble lay with the central divisions. The exploration of the portion from near Frederickton to Boiestown was assigned to Sir James Alexander; and his party was to consist of one officer, one assistant surveyor, one Indian guide, and eight attendants, woodmen, or lumberers. The duty was of a very serious kind. It was to hew a track of six clear feet through the trees and brush, so as to permit the use of the measuring chain and compass with sights; and this being done, axemen were to follow and blaze the trees, by cutting a slice of bark off each tree along the proposed line. When it is considered that the line was to perforate woods which had never been traversed by civilised man; that for months the party would not see a town or village, if, indeed, any human habitation; and that provisions and all other articles required to be carried on men's backs--for no beast of burthen could travel such entangled wildernesses--the difficulties will seem almost insurmountable. Yet even all this was found to be as nothing in comparison with that most fearful of all torments--the plague of insects. That a gentleman accustomed to ordinary refinements should have volunteered such an exploration, is only another proof of the sturdy heroism of the English soldier, who fears nothing in the cause of duty, or which can redound to the glory of his country.