London. From there, Baptist practices and teachings spread throughout the country. Observance of the Sabbath in England was replaced by the first day of the week, Sunday. It was after 1617, with Hamlet Jackson and the couple John and Dorothy Traske, that the beginning of the observance of the Sabbath in England and the occurrence of well-known debates on the subject arose. The beginning took place in London, where the follower of preacher Traske, called Hamlet Jackson, a tailor and self-taught Bible student, convinced Traske of the observance of the seventh day (Saturday). After a period of persuasion by John Traske, he was accused of writing two scandalous letters to the king and sentenced by the authorities to prison on June 19, 1618, for "…aspiring to be the leader of a Jewish faction". After a year in prison, John Traske recanted, was released and tried to divert his followers from this and other doctrines he preached. However, Dorothy Traske did not deny her convictions and remained in prison for 25 years. After these, other groups also kept and declared Sabbath observance, which led to retaliation by the political and ecclesiastical authorities of the time. Under the republican rule of the Commonwealth of England between 1649 and 1660, many independent churches were tolerated and enjoyed relative religious and political freedom. This freedom provided the search for a religious identity and a greater focus on the scriptures instead of other elements such as tradition, with that the first Seventh Day Baptists emerged. In 1650, James Ockford published in London the book The Doctrine of the Fourth Commandment, Deformed by Popery, Reformed & Restored to its Primitive Purity, which was the first writings of a Baptist defending Sabbath observance. The book generated such a nuisance that the mayor of Salisbury, the city where Ockford lived, asked the president of Parliament for guidance on how to handle the work; a parliamentary committee determined that all copies should be burned without giving the opportunity for James Ockford to defend them. Only one copy has escaped, kept today in a library in Oxford. The first known Seventh Day Baptist Church was the Mill Yard Church established in London, where the first service took place in 1651, led by Peter Chamberlen. M.D. "the Third". The first records of church activities were destroyed in a fire; the second record book is in possession of the Seventh Day Baptist