text: In one of this man's novels, Kuprasso's cafe is revealed to hide the Garden-house of Suliman the Red, where several characters are hypnotized by the dancing of the Companions of the Rosy Hours.
full_question: In one of this man's novels, Kuprasso's cafe is revealed to hide the Garden-house of Suliman the Red, where several characters are hypnotized by the dancing of the Companions of the Rosy Hours. Peter Pienaar and Sandy Arbuthnot often accompany one of this man's characters, who poses as "Twisdon" and gives an impromptu speech on free trade for the political candidate Sir Harry. Early in a novel by this man, the protagonist disguises himself as a milkman to escape his apartment after the death of Franklin Scudder. The protagonist of his most famous novel discovers that the Black Stone, a ring of German spies, are plotting to assassinate the Greek Premier Karolides and invade England, causing that character to flee both to and from the Scottish countryside. For 10 points, name this Scottish author who, in addition to being the 15th Governor-General of Canada, wrote about the adventures of Richard Hannay in novels like Greenmantle and The Thirty-Nine Steps.
first_sentence: In one of this man's novels, Kuprasso's cafe is revealed to hide the Garden-house of Suliman the Red, where several characters are hypnotized by the dancing of the Companions of the Rosy Hours.
raw_answer: John Buchan [or Lord Tweedsmuir; or the 1st Baron Tweedsmuir]