Correspondence and documents, including family letters primarily from Frederic Tudor to his brother William and from William Tudor Jr. to his father. Correspondence also includes thirty-four letters, 1789-1801, to William Tudor Sr. written from England by Sarah Troutbeck, daughter of John Troutbeck, King's reader at King's Chapel, Boston, who had returned to England during the Revolution. Another group of nineteen letters, written in 1823 from Washington by William Lee (1772-1840) to William Tudor Jr. comment on political events. Other family papers include college papers written at Harvard by John Henry Tudor, another son of William Tudor Sr. and some documents relating to John Tudor, the father of William Tudor Sr. Other documents include powers of attorney for William Tudor. Sr., often relating to the administration of loyalist properties, and papers relating to his tenure as Massachusetts secretary of state.