It's definitely repetition. Just finished the question and it was correct :-)
Answer:
Allusion is the answer. It's mentioning the river and what it's known for but not telling you the name of the river.
Based on the excerpt is that tom is clearly ignoring his aunt's remorse on purpose. It is stated that he knows that a "yearning glance" was upon him but he refused to recognize it that is to acknowledge it. He even goes so far to imagine denying his aunt what she wants to hear even on his deathbed.
