This collection consists of five disbound volumes of letters written to and from William Dillwyn of London and his daughter Susanna Dillwyn in America from 1770 to 1795; and thereafter until 1818, to and from Susanna and her husband Samuel Emlen, Jr. of Burlington County, New Jersey. Although Susanna lived almost her entire life apart from her father, their letters are frequent and deal primarily with family matters and kin. However, there is frequent comment concerning such topics as yellow fever; abolitionism and slavery; and American and European politics, including the Napoleonic wars and the embargo, as well as their effects upon trade and merchants in Philadelphia and London. Moreover, events such as the Federal Convention of 1787 and topics such as the health of Benjamin Franklin, the popularity of President Washington and the trials of a new republic are addressed throughout the correspondence.