Use "strongbox" in a sentence

1. The strongbox yielded, and the other

2. He is a millionaire, and they have made him a baron, and now he is the Baron Danglars, with a fine residence in the Rue de Mont-Blanc, with ten horses in his stables, six footmen in his ante-chamber, and I know not how many millions in his strongbox

3. What sort of man would they choose for a third courier? The Gestapo man watches him, his attention on the stone, his left hand on the door of the strongbox