In January, 1821, Rev. Jared Sparks began the publication in Baltimore of The Unitarian Miscellany and Christian Monitor; and for three years he was its editor. For another three years it was conducted by his successor in the Baltimore pulpit, Rev. Francis W.P. Greenwood, who continued it until he became the minister of King's Chapel, when it ceased to exist. During the six years of its publication this magazine was ably edited. It was controversial in a liberal spirit, it was positively denominational, and it had a large and widely extended circulation. It reported all prominent Unitarian events, and those of a liberal tendency in all religious bodies. Attacks on Unitarianism were repelled, and the Unitarian position was explained and vindicated. Mr. Sparks was as aggressive as Andrews Norton had been, and was by no means willing to keep to the quiet and reticent manner of the Unitarians of Boston. When he was attacked, he replied with energy and skill; and he carried the war into the enemies' camp. His magazine was far more positive than anything the liberals had hitherto put forth, and its methods were viewed with something of suspicion in the conservative circles of Massachusetts. He published a series of letters on the Episcopal Church in The Unitarian Miscellany, which he enlarged and put into a book.[17] Another series of letters was on the comparative moral tendencies of Trinitarian and Unitarian doctrines, and these grew into a volume.[18] Both were in reply to attacks made upon him, and both were regarded with suspicion and doubt by the men about Cambridge; but, in time, they came to see that his method was sincere, learned, and honest.