Also, the high standard held up to the public mind by the College of Physicians, which gave its peculiar sanction to the expensive and highly rarefied medical instruction obtained by graduates of Oxford and Cambridge, did not hinder quackery from having an excellent time of it; for since professional practice chiefly consisted in giving a great many drugs, the public inferred that it might be better off with more drugs still, if they could only be got cheaply, and hence swallowed large cubic measures of physic prescribed by unscrupulous ignorance which had taken no degrees. Considering that statistics had not yet embraced a calculation as to the number of ignorant or canting doctors which absolutely must exist in the teeth of all changes, it seemed to Lydgate that a change in the units was the most direct mode of changing the numbers. He meant to be a unit who would make a certain amount of difference towards that spreading change which would one day tell appreciably upon the averages, and in the meantime have the pleasure of making an advantageous difference to the viscera of his own patients. But he did not simply aim at a more genuine kind of practice than was common.