John Buchan book The Power-House
Source: The Power-House (1916), Ch. 1 "Beginning of the Wild-Goose Chase"
John Buchan, 1st Baron Tweedsmuir was a Scottish novelist, historian and Unionist politician who served as Governor General of Canada, the 15th since Canadian Confederation.
After a brief legal career, Buchan simultaneously began his writing career and his political and diplomatic careers, serving as a private secretary to the colonial administrator of various colonies in southern Africa. He eventually wrote propaganda for the British war effort in the First World War. Buchan was in 1927 elected Member of Parliament for the Combined Scottish Universities, but he spent most of his time on his writing career, notably writing The Thirty-Nine Steps and other adventure fiction. In 1935 he was appointed Governor General of Canada by King George V, on the recommendation of Prime Minister of Canada R. B. Bennett, to replace the Earl of Bessborough. He occupied the post until his death in 1940. Buchan proved to be enthusiastic about literacy, as well as the evolution of Canadian culture, and he received a state funeral in Canada before his ashes were returned to the United Kingdom.

John Buchan book The Power-House
Source: The Power-House (1916), Ch. 1 "Beginning of the Wild-Goose Chase"
John Buchan book Salute to Adventurers
Source: Salute to Adventurers (1915), Ch. 28 "How Three Souls Found Their Heritage"
John Buchan book The Power-House
Source: The Power-House (1916), Ch. 3 "Tells of a Midsummer Night"
John Buchan book The Path of the King
Source: The Path of the King (1921), Ch. XIV "The End of the Road", II
John Buchan book Salute to Adventurers
Source: Salute to Adventurers (1915), Ch. 16 "The Ford of the Rapidan"
John Buchan book A Lodge in the Wilderness
Source: A Lodge in the Wilderness (1906), Ch. X, p. 272
“Her voice had a thrill in it like music, frosty music.”
John Buchan book Huntingtower
Prologue
Huntingtower (1922)
"A University's Bequest to Youth" (10 October 1936)
Canadian Occasions (1940)
John Buchan book The Path of the King
Prologue
The Path of the King (1921)
John Buchan book The Path of the King
Source: The Path of the King (1921), Ch. VIII "The Hidden City"
John Buchan book Witch Wood
Source: Witch Wood (1927), Ch. VIII "The Second Blast"
“There may be Peace without Joy, and Joy without Peace, but the two combined make Happiness.”
Pilgrim's Way (1940), p. 117
Memory Hold-The-Door (1940)
John Buchan book Prester John
Source: Prester John (1910), Ch. X
John Buchan book The Path of the King
Source: The Path of the King (1921), Ch. XIV "The End of the Road", II
John Buchan book Witch Wood
Source: Witch Wood (1927), Ch. XIV "The Counterblast"
“Perfect love casteth out fear, the Bible says; but, to speak it reverently, so does perfect hate.”
John Buchan book Prester John
Source: Prester John (1910), Ch. IX
John Buchan book Prester John
Source: Prester John (1910), Ch. X
“It was a very happy time, but like all happy times it had no landmarks.”
John Buchan book A Lodge in the Wilderness
Source: A Lodge in the Wilderness (1906), Ch. X, p. 268
“I always try to suit my clothes to my company. It is the only way to be inconspicuous.”
John Buchan book The House of the Four Winds
Prologue
The House of the Four Winds (1935)
“Peace is that state in which fear of any kind is unknown.”
Pilgrim's Way (1940), p. 117
Memory Hold-The-Door (1940)
“He knew less about women than he knew about the physics of hyperspace.”
John Buchan book The House of the Four Winds
Source: The House of the Four Winds (1935), Ch. XI
Space (1912)
John Buchan book The Path of the King
Source: The Path of the King (1921), Ch. XIV "The End of the Road", I
Montrose and Leadership (1930), p 24; republished in Men and Deeds (1977)
“Honest intention will not cure faulty practice.”
John Buchan book Witch Wood
Source: Witch Wood (1927), Ch. III "Guests in Calidon Tower"
John Buchan book Castle Gay
Source: Castle Gay (1930), Ch. 20
“[L]oyalty and religion have many meanings, and self-interest is a skilled interpreter.”
Source: Midwinter (1923), Ch. I
John Buchan book The Power-House
Source: The Power-House (1916), Ch. 3 "Tells of a Midsummer Night"
John Buchan book Castle Gay
Source: Castle Gay (1930), Ch. 14
John Buchan book The Power-House
Source: The Power-House (1916), Ch. 8 "The Power-House"
“Every man at the bottom of his heart believes that he is a born detective.”
John Buchan book The Power-House
Source: The Power-House (1916), Ch. 2 "I First Hear Of Mr Andrew Lumley"
“If anyone makes trouble I've advised him to dot him one on the jaw in the best British style.”
John Buchan book The House of the Four Winds
Source: The House of the Four Winds (1935), Ch. III
John Buchan book The Path of the King
Prologue
The Path of the King (1921)
John Buchan book Witch Wood
Source: Witch Wood (1927), Ch. XVII "Woodilee and Calidon"
“We had our pride shattered, and without humility there can be no humanity.”
"A University's Bequest to Youth" (10 October 1936)
Canadian Occasions (1940)
“I never mind choler in a man if he have also honesty and good sense.”
John Buchan book Salute to Adventurers
Source: Salute to Adventurers (1915), Ch. 6 "Tells of My Education"
“To live for a time close to great minds is the best kind of education.”
Pilgrim's Way (1940), p. 26
Memory Hold-The-Door (1940)
“It is only a dying cause which can attain to perfect taste.”
John Buchan book A Lodge in the Wilderness
Source: A Lodge in the Wilderness (1906), Ch. III, p. 83
John Buchan book Witch Wood
Source: Witch Wood (1927), Ch. X "What the Moon Saw"
“It's the Idea that wins every time — the Idea with brains and guts behind it.”
John Buchan book The House of the Four Winds
Envoi
The House of the Four Winds (1935)
John Buchan book The Path of the King
Source: The Path of the King (1921), Ch. V "The Maid"
John Buchan book A Lodge in the Wilderness
Source: A Lodge in the Wilderness (1906), Ch. XI, pp. 313–4