Question: William H. Mumler made a photograph of the wife of which 16th President?

Context paragraphs:
William N. Johnston: William N. Johnston became the 16th president of Wesley College (Delaware) in June 2008 and retired in July 2015.  Previous to this post Johnston served as the 27th president of Iowa Wesleyan College for six years, and as a lower level administrator at Bethany College in Bethany, West Virginia, Davis & Elkins College in West Virginia, West Virginia Wesleyan College, and Ashland University in Ohio.

William H. Mumler: William H. Mumler (1832–1884) was an American spirit photographer who worked in New York and Boston.  His first spirit photograph was a self-portrait which developed to apparently show his deceased cousin.  Mumler then left his job as a jeweller, instead opting to work as a full-time photographer, taking advantage of the large number of people who had lost relatives in the American Civil War.  Perhaps his two most famous works are the photograph of Mary Todd Lincoln with the ghost of her husband Abraham Lincoln, and his photo of Master Herrod, a medium, with three spirit guides.

Boston Lyceum: The Boston Lyceum (est.1829) of Boston, Massachusetts was a civic association dedicated to popular education in the form of "lectures, discussions, ... declamation," and writing contests.  It began "in Chauncy Hall on 25 June 1829.  On 13 August 1829 it formed its classes and made provisions for lectures and debates."  Annual members' "exhibitions" of elocution took place in various venues around town, such as the Masonic Temple (1832), Tremont Hall (1839) and the Odeon (1840).  Leaders included George Bancroft, Timothy Claxton, James T. Fields, Abbott Lawrence, William H. Prescott, William D. Ticknor, and Amasa Walker.  Among the many lecturers: Nehemiah Adams, J.A. Bolles, David Paul Brown, Rufus Choate, William M. Cornell, C.C. Emerson, James Pollard Espy, Edward Everett, Dr. Grigg, George S. Hillard, Oliver Wendell Holmes, Dr. C.T. Jackson, N. Jones, Rev. John Pierpont, Edgar Allan Poe, John Osborne Sargent, William H. Simmons, Charles Sumner, B.B. Thatcher, Henry Theodore Tuckerman, Amasa Walker, and E.M.P. Wells.

William H. McElwain School: The William H. McElwain School is a historic school building at 250 Main Street in Bridgewater, Massachusetts.  The two story brick Classical Revival building was built in 1912 to a design by the architectural firm of Loring and Phipps.  The school was named for William H. McElwain (1867-1908), the owner of one of the William H. McElwain Company, a shoe manufacturer who was one of the major employers in Bridgewater at the turn of the 20th century.  The school's construction was approved by the town shortly before workers in the firm's Bridgewater factory went on strike.  Despite this, the town accepted land in donation from McElwain's family on which to build the school, and named it in his honor.  It served as a public school until 1997, and has sat vacant since then.  The school is believed to be the best-preserved school building in Massachusetts designed by Loring and Phipps.

Col. William H. Fulkerson Farmstead: The Col. William H. Fulkerson Farmstead, also known as Hazel Dell, is a historic farm located at 1510 North State Street (U.S. Route 67) 1.5 mi north of Jerseyville, Illinois.  The 58.26 acre farm includes an Italian Villa style farmhouse, a carriage house, a barn, grain fields, and fruit orchards.  Colonel William H. Fulkerson, a Confederate Civil War veteran, and his wife Cornelia settled at the farm in 1866.  The couple began construction on the farmhouse in the same year; it was completed in 1872.  The two-story farmhouse, designed by Jerseyville architect William Embley, is one of the best-preserved Italian Villa style houses in the Jerseyville area.  A tower with a mansard roof, a characteristic Italian Villa element, tops the front entrance.  The house's front porch features arched openings and scrolled bracket; a smaller porch on the north side has the same design.  In typical Italianate fashion, the house's windows are mainly tall and rectangular with brick hoods, and several have a segmental arched form.

Mary Todd Lincoln: Mary Ann Todd Lincoln (December 13, 1818 – July 16, 1882) was the wife of the 16th President of the United States, Abraham Lincoln, and was First Lady of the United States from 1861 to 1865.  She dropped the name Ann after her younger sister, Ann Todd [Clark], was born, and did not use the name Todd after marrying.

Myles Brand: Myles Neil Brand (May 17, 1942 – September 16, 2009) was the 14th president of the University of Oregon, 16th president of Indiana University, and 4th president of the United States' National Collegiate Athletic Association (NCAA).

William H. Hume: William H. Hume was an American architect in New York City.  His work included the Hebrew Orphan Asylum of New York (1884) on Amsterdam Avenue (used as an Army Hall in 1943 and then by City College, the site is now the Jacob H. Schiff Playground), Langdon Building at 305 Broadway, Scotch Presbyterian Church on 96th Church and Central Park West (during the booming 1920s it was replaced by a "Skyscraper Church" designed by Rosario Candela, constructed in 1928–29 it included a 16-story apartment tower and a new church sanctuary and classroom space set into the base and fronting West 96th Street) New Netherland Hotel (1892), replaced by the Sherry Netherland Hotel in 1927, Mutual Reserve Building at 305 Broadway and an addition at 615–629 Avenue of the Americas (Sixth Avenue) between West 18th and 19th Streets in the Flatiron District of Manhattan, New York City.  Originally the B. Altman Dry Goods Store, built 1876–77 (David & John Jardine), with addition on the south in 1887 by William H. Hume, and on West 18th Street by Buchman & Fox, 1909.  B. Altman moved to Fifth Avenue and 34th Street in 1906.  The current street retail occupant is The Container Store.

1872 Democratic National Convention: The 1872 Democratic National Convention was a presidential nominating convention held at Ford's Grand Opera House on East Fayette Street, (between North Howard and North Eutaw Streets) in Baltimore, Maryland on July 9 to 10, 1872.  It resulted in the nomination of newspaper publisher Horace Greeley, (1811-1872), of New York and Governor Benjamin Gratz Brown, (1826-1885), of Missouri for President and Vice President, a ticket previously nominated by the rump Liberal Republican faction convention meeting also in Baltimore's newly built premier Opera House of nationally well-known theatre owner/operator John T. Ford, (1829-1894), (infamous as the owner of the Ford's Theatre in Washington, D.C. where 16th President Abraham Lincoln had been assassinated in April 1865) of the major Republican Party which had already re-nominated incumbent 18th President Ulysses S. Grant, (1822-1885), of the regular Republicans for another term.

USS William H. Bates (SSN-680): USS "William H. Bates" (SSN-680), a "Sturgeon"-class attack submarine, was planned to be the second U.S. Navy ship to be named USS "Redfish"—for the redfish, a variety of salmon also called blueback, sawqui, red salmon, and nerka—when the contract to build her was awarded to Ingalls Shipbuilding in Pascagoula, Mississippi, on 25 June 1968.  However, upon the 22 June 1969 death of William H. Bates (1917–1969), the U.S. Representative from Massachusetts's 6th Congressional District (1950–1969) known for his staunch support of nuclear propulsion in the U.S. Navy, she was renamed "William H. Bates" and was laid down on 4 August 1969 as the only ship of the U.S. Navy to have borne the name.  The reason for her naming by then-Secretary of the Navy John Chafee, breaking with a long-standing Navy tradition of naming U.S. Navy attack submarines for sea creatures, was best summed up by Admiral Hyman Rickover, the then-director of the Navy's nuclear reactors program, with the pithy comment that, "Fish don't vote!"

Supporting paragraphs: William H. Mumler Mary Todd Lincoln
Answer: Abraham Lincoln