On 31 July 1910, Hawley Harvey Crippen, better known as Dr Crippen, and Ethel Le Neve, his typist-turned-lover, were arrested on board the Montrose while trying to flee west to Canada. On top of being a sensational case and arrest, it was the first example of an arrest aided by wireless telegraphy. A cross-Atlantic chase of a fleeing couple is an apt ending to our July theme of travel and migration. When you ask yourself why your ancestor or the …