Question: In what year did the president under whom John Elliott Ward was United States Minister to China die?

Context paragraphs:
John Elliott Ward: John Elliott Ward (October 2, 1814 – November 29, 1902) was an American politician and diplomat.  He served as United States Attorney for Georgia, mayor of Savannah, Georgia, speaker of the Georgia House of Representatives, president of the Georgia Senate, president of the 1856 Democratic National Convention, and United States Minister to China under James Buchanan.  He resigned from his diplomatic post shortly after the outbreak of the American Civil War, returned to Savannah, and after the war, moved to New York City, where he practiced law for several years.

James Buchanan: James Buchanan Jr. ( ; April 23, 1791June 1, 1868) was the 15th President of the United States (1857–61), serving immediately prior to the American Civil War.  He is the only president from Pennsylvania, the only president to remain a lifelong bachelor, and the last president born in the 18th century.  A member of the Democratic Party, he was the 17th United States Secretary of State and served in the United States Senate and United States House of Representatives.

John E. Pillsbury: John Elliott Pillsbury (15 December 1846 – 30 December 1919) was a Rear Admiral in the United States Navy.

John Elliott (Georgia): John Elliott (October 24, 1773 – August 9, 1827) was a United States Senator from Georgia, serving from 1819 to 1825.

William Short (American ambassador): William Short (1759–1849) was Thomas Jefferson's private secretary when Jefferson was a peace commissioner and then the United States Minister to France in Paris, from 1784 to 1789.  Jefferson, later the third President of the United States, was a lifelong mentor and friend.  In a 1789 letter, Jefferson referred to Short as his "adoptive son."  Short was an early member and president (1778–1781) of Phi Beta Kappa at the College of William & Mary, was elected to Virginia's Executive Council in 1783–1784, served as America's chargé d'affaires in France during the French Revolution from 1789–1792, was then appointed as America's Minister to the Netherlands and as a treaty commissioner to Spain.  (The United States did not have ambassadors until 1893.  Until that time, the highest ranking diplomats were known as ministers.)  Although his diplomatic career was not as celebrated or long as Short may have wished, and his love affair with a French noblewoman ended with her marrying another man, Short was a successful businessman and an opponent of slavery who died very wealthy in America.

Michael J. Elliott: Michael John Elliott OBE (31 May 1951 – 14 July 2016) was a British journalist and executive, long-based in the United States.  He was the president and chief executive officer of the anti-poverty advocacy organization ONE.

John L. Stevens: John Leavitt Stevens (August 1, 1820 – February 8, 1895) was the United States Minister to the Kingdom of Hawaii in 1893 when he was accused of conspiring to overthrow Queen Liliuokalani in association with the Committee of Safety, led by Lorrin A. Thurston and Sanford B. Dole – the first Americans attempting to overthrow a foreign government under the auspices of a United States government officer.  John L. Stevens, journalist, author, minister, newspaper publisher and diplomat, was also a Maine State Senator who was a founder of the Republican Party in Maine.

Frederick Dent Grant: Frederick Dent Grant (May 30, 1850 – April 12, 1912) was a soldier and United States minister to Austria-Hungary.  Grant was the first son of General of the Army and President of the United States Ulysses S. Grant and Julia Grant.  He was named after his uncle, Frederick Tracy Dent.  The Grant family came from a line of Scottish and Irish heritage.

Elihu B. Washburne: Elihu Benjamin Washburne (September 23, 1816 – October 23, 1887) was an American politician and diplomat.  A member of the Washburn family, which played a prominent role in the early formation of the United States Republican Party, he served as a congressman from Illinois before and during the American Civil War.  He was a political ally of President Abraham Lincoln and General (later President) Ulysses S. Grant.  During Grant's administration, Washburne was the 25th United States Secretary of State, briefly in 1869, and was the United States Minister to France from 1869 to 1877.

Emeralds (band): Emeralds was an American electronic music trio founded in 2006 by members John Elliott, Steve Hauschildt and Mark McGuire.  The band was based in Cleveland, Ohio and Portland, Oregon, United States.

Supporting paragraphs: John Elliott Ward James Buchanan
Answer: 1868