A bold challenge to the whole colledge of physicians [electronic resource] : or, a defence of those practitioners in physick commonly call'd quacks, namely Dr. M---tin, Dr. M---re, Dr. V---k---s, Dr. W---t--s, Dr. T---l--g, Dr. Th---n--lt, Dr. Anodyne Necklace. Cum multis alijs, both Doctors, and Doctoresses. Likewise a Vindication of many Eminent Piss-Prophets, Astrologers, Conjurers, both Male and Female, from the Aspersions cast upon them by a late Author.