After months of knowing him, I ask him his name. ''Saheb-e-Alam,'' he announces. He does not know what it means. If he knew its meaning - lord of the universe - he would have a hard time believing it. Unaware of what his name represents, he roams the streets with his friends, an army of barefoot boys who appear like the morning birds and disappear at noon. Over the months, I have come to recognise each of them.

Which literary device is used here ?