The last solemn minutes before the departure of the train passed slowly.

Grave men in uniform paraded the platform, glancing occasionally at their watches.

The engine-driver watched from his cabin for the waving of the green flag which would authorise him to push over his levers and start the train.

The great moment had almost arrived.

The guard held his whistle to his lips, and had the green flag ready to be unfurled, in his left hand.