To exterminate Smallpox by means of chemists and apothecaries, the greatest friends of Smallpox, is to cast out devils by Beelzebub, the prince of the devils. You might as well expect a foxhunter to destroy the breed of foxes, or a ratcatcher to exterminate the race of rats. The _Vaccine Scourge_ producing little effect, Ring returned to the charge in the following year, 1816, with _A Caution against Vaccine Swindlers and Imposters_.[186] The _Caution_ is a series of libels, the puerility and extravagance of which were their own nullification. A motto was taken from the _New Monthly Magazine_ for the title-page, as follows-- The Jennerian discovery has shed a brilliant lustre on our era; but unfortunately, the discovery has been in a great degree rendered abortive by _bastard institutions_, created for the purpose of filling the pockets of _a set of adventurers, without education_, and _destitute of principle_. We could name several wretches who have fattened, and are still fattening, on such jobs. Ring delivered his mind unequivocally. Walker was an imposter, and the London Vaccine Institution prospered by his frauds-- There is a Society in this Metropolis [he wrote], falsely calling itself the Royal Jennerian Society, which has been collecting subscriptions to a considerable amount under that assumed name; and thus collecting money under false pretences. An eminent physician speaking of this Society and its successful state, called it a successful villany; and villany is not the less villany because it is successful. It has also been organising a complete system of quackery, by granting diplomas to persons totally ignorant of the first principles of the medical profession, which will add to the present host of empirics. No one can now pass along the streets without being annoyed with the inscription, VACCINATION GRATIS UNDER THE SANCTION OF THE LONDON VACCINE INSTITUTION in one pane of glass, MACASSAR OIL in a second, and PATENT BLACKING in a third. In short Vaccination is now _quite a drug_. These were words of envy and malice, and came with odious inconsistency from the spokesman of Jenner, who had instructed and encouraged his acquaintances, male and female, to practise vaccination. We may, however, take Ring’s evidence as to Walker’s activity in London-- Dr. Walker glories in his chemical, galenical, pharmaceutical, and dentrifical inoculators; and boasts that they exceed in number those of any other vaccine institution; but he glories in his shame. _Non numerentur, sed ponderentur._ They are springing up under every pestle and mortar, and barber’s pole, like mushrooms in a hot-bed, from Hyde-Park Corner to Whitechapel, and from Whitechapel to Blackwall. It is the duty of every regular practitioner to expose such imposters, and to encourage such exposure. It is, in fact, the rescuing of life from fraudulent and rapacious hands.