Answer:
The phrase "who, in return, would give" is a context clue which helps to identify the meaning of 'bestow'.
Step-by-step explanation:
As you probably know, bestow means 'to give'. The phrase "who, in return, would give" implies that the urchins are returning a favor Douglass did for them, or, more concisely, that they are giving back to him because he gave to them.