Plzz explain line no.20

Plzz explain line no.20 15- 16. 17. 18. 19. 20. 21. 22. 23. 24. "Waiting for be last bus from Padua. We shall sell all our papers when it comes in.' •Must you work so hard? You both look rathertired "We are not cornplaining, sir." , But next morning, when I went over to the fountain to have my shoes 'hined, I said, 'Nicola, the way you and Jacopo work, you must earn quite a bit. You spend nothing on clothes. You eat little enough when I see you have a meal it's usually black bread and figs. Tell me. What do you do with your money?" He coloured deeply under his sunburn , then grew pale. He looked to the ground. "You must be saving up to emigrate to America,o I suggested. He looked at me sideways, spoke with an effort. •we should greatly like to go to the States. But here, at present, we have other plans." "What plans?" He smiled uncommably. "Just plans, sir," he answered in a lowvoice.