Caleb sat and listened, taking in the information, processing it. He knew of the practice, obliquely, but it wasn't a subject that he knew anything about; and why would he? Blood letting, both as a general practice and an assisted one with leeches, wasn't common in Exandria except in areas where there weren't clerics around.

"Isn't there an...anti-coagulant in leeches? In the bite?" He frowned a little bit, thoughtful. What was he getting at there? Instead, he shook his head after a moment. "I am afraid they aren't in use where I am from, either. We have clerics and and druids. Even a bard can do a healing word."