| The wharves are a favorite meeting place for the gang | Frontispiece |
| Boys “jump freights” because they “like to go and see places” | 20 |
| “We fought for the fun of it” | 20 |
| A football game between city gangs | 44 |
| “A shanty or clubhouse in the woods” | 44 |
| An inadequate playground | 170 |
| A model playground | 170 |