Hannibal did not continue. He found himself happy to hear that Erik could see the same things he saw. There was no need to keep going down the list of interesting and unexpected similarities. Though he was quite sure now that as they became better acquainted with one another, there would be more that came into the light.
He was, instead, looking to his right, into a darkness that was more than what they stood in now. There was no way to tell if anything was beyond, if one didn't know. With the knowledge that it was a ravine he looked upon, and that there was truly nothing but an empty fall to unknowable deaths did not frighten Hannibal. He felt a bit of a smirk crawl up one side of his face and gave consideration to what might happen to the body they carried if they were to just let it tumble over the side.
Hannibal's full attention was brought to Erik when the question was voiced. There were reasons to not share that information, the need to keep himself safe. The need to keep River out of harm's way. As well as the need to keep her from knowing everything that he had done. But none of those reasons, he felt, applied to the man who was assisting him at this moment. Even if Erik's ultimate goal here was to abandon the deepening friendship and either leave Hannibal to rot in these catacombs, or kill him outright, Hannibal did not believe that he would do anything with the information outside of have it.
"Seventy four." He said calmly in his strange accent. Then his eyes fell to the man that they were carrying. "Seventy five."