of the Academy of Natural Sciences of Philadelphia (Philadelphia, 1854) 1816 births 1865 deaths Lawyers from Philadelphia American paleontologists American abolitionists 19th-century American historians 19th-century American male writers Pennsylvania lawyers Quakers from Pennsylvania American people of Welsh descent Place of birth missing Place of death missing Prison reformers Members of the American Philosophical Society Activists from Philadelphia Historians from Pennsylvania Quaker abolitionists 19th-century American lawyers American male non-fiction writers