The William Ellery Channing collection contains eight personal letters written to Channing, a Unitarian preacher, by Andrews Norton in Cambridge, England, and George Armstrong in Crossdoney, Ireland, who discussed a range of religious topics related to Unitarian theology and transatlantic cooperation between Unitarian societies. In his two letters, Norton focused on the relationship between Unitarians in the United States and those in Great Britain and, to a lesser extent, throughout Europe. He encouraged cooperation with like-minded groups and wished to compile biographical information about local believers. George Armstrong, who later moved to Bristol, England, composed five letters, in which he shared his thoughts on Channing's writings and those of other Unitarians, and on many theological matters; he also remarked briefly about British politics. Less frequently, he expressed his opinions on Americans and on slavery, which he fervently opposed. In one 17-page letter, Armstrong responded directly to a discourse recently published by Channing, challenging some of his views and presenting detailed insight into Armstrong's religious philosophy (May 29, 1834).