Petitions Congress February 3 as president of Pennsylvania Abolition Society against slavery and slave trade. Restates religious beliefs March 9 in letter to Ezra Stiles, expressing faith in benevolent deity. Last public writing, March 23, satirizes a defense of slavery. In last letter and final public service, April 8, replies to Secretary of State Jefferson's query on northeast boundary as settled at Paris by peace commissioners; sends his copy of Mitchell map used there. Dies quietly at home, the evening of April 17. Although painfully afflicted in last years by bladder stone, dies of pleurisy, accompanied by suppurated lungs. Buried April 21 beside wife, Deborah, and son Francis in Christ Church burial ground, Philadelphia.