Cotton Mather, a leading Puritan minister and one of New England’s leading lay doctors, was not satisfied with this passive course of inaction, and so in June he sent letters to many of Boston's physicians suggesting that they try a new form of inoculation, and mentioning the favorable findings of Drs. Timonius and Pylarinus that had been published in the Transactions of the Royal Society of London. Mather was a member of this leading scientific society in England.