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In page The 39 Steps (1959 film):

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A number of critics have pointed to the slow pacing of the film, noting a lack of suspense, usually attributed to More's charming but leisurely performance.[citation needed] Comparing it with Hitchcock's version A.H. Waiton writing in 1960 suggested: "the pace, as well as the execution is milder, more civilised and somehow less suspenseful than it seemed previously. Mr Thomas's direction may be at the core of it all, but Kenneth More's polished performance seems lacking in urgency. He is a frowning, somewhat put-upon gent, but certainly not a citizen involved in a life-and-death matter."[2]