You are to station yourself close to that open window." "Yes." "You are to watch me, for I will be visible to you." "Yes." "And when I raise my hand--so--you will throw into the room what I give you to throw, and will, at the same time, raise the cry of fire.

You quite follow me ?" "Entirely." "It is nothing very formidable," he said, taking a long cigar-shaped roll from his pocket.

"It is an ordinary plumber's smoke-rocket, fitted with a cap at either end to make it self-lighting.
Your task is confined to that.

When you raise your cry of fire, it will be taken up by quite a number of people.

You may then walk to the end of the street, and I will rejoin you in ten minutes.