@book {23382,
	title = {In search of the magnetic North : A soldier-surveyor{\textquoteright}s letters from the North-West, 1843-1844},
	year = {1975},
	pages = {1-171},
	address = {[Ottawa] : National Library of Canada},
	keywords = {letters, magnetic north, solider, survey},
	author = {Lefroy, Sir John Henry}
}
