The 39 Steps. Poster of the 1935 movie and cover of the 1915 book, The Thirty-Nine Steps
VS3
The Thirty-Nine Steps
John Buchan, 1915
movie vs book
Alfred Hitchcock, 1935

At a London music hall theatre, Richard Hannay is watching a demonstration of the superlative powers of recall of Mr. Memory when shots are fired. When he sees police searching the train, he enters a compartment and starts kissing the sole occupant, Pamela, in a desperate attempt to escape detection.