Read it through once

Then follows a long account of how a dying woman, who had suffered nine hours a day with an ague during eight weeks, and who had been bled dry some dozens of times meantime without apparent benefit, was at last forced to swallow several wads of ‘Spiders-web,’ whereupon she straightway mended, and promptly got well. So the sage is full of enthusiasm over the spider-webs, and mentions only in the most casual way the discontinuance of the daily bleedings, plainly never suspecting that this had anything to do with the cure.