Question: When was the American painter which was part of those that exhibited at Amory Hall born? 

Context articles: George Catlin
New England Reformers
Lloyd Sexton Jr.
Vonn Cummings Sumner
Kahlil Gibran (sculptor)
Joseph Alexander Ames
Hope Gangloff
Amory Hall (Boston)
Edith Ella Baldwin
Edward Hopley

George Catlin (July 26, 1796 – December 23, 1872) was an American painter, author, and traveler, who specialized in portraits of Native Americans in the Old West.
 Travelling to the American West five times during the 1830s, Catlin was the first white man to depict Plains Indians in their native territory.
The "New England Reformers" was a lecture by Ralph Waldo Emerson read before "The Society" in Amory Hall, on Sunday, March 3, 1844.
 "The Society" has been identified as the American Anti-Slavery Society, led by William Lloyd Garrison.
Lloyd Sexton Jr. (1912–1990), who is also known as Leo Lloyd Sexton Jr. was an American painter born in Hilo, Hawaii on March 24, 1912.
 In 1931 he entered the School of the Museum of Fine Arts, Boston.
 In 1933 he had a show of flower paintings at the Vose Galleries in Boston, followed by exhibitions at the Honolulu Museum of Art and at Gump's in San Francisco.
 He spent several years in Europe, painting and traveling during the summers and studying at the Slade School of Art in London during the winters.
 In his third and final year of instruction there, one of his figure paintings won first prize, and in 1936 a flower painting was exhibited the Royal Academy in London.
 Sexton returned to Hilo in 1937 and concentrated on figure painting and portraiture.
 That same year his painting "Nanea" was accepted and exhibited at the Royal Academy.
 Sexton executed a large number of portraits and, beginning in 1934, before he left for Europe, did two commissions for the Hawaiian Pineapple Company.
 He was a frequent and popular exhibitor in group shows in Honolulu.
 He also had one-person shows at Honolulu's Grossman-Moody Gallery in 1957 and at the Hilton Hawaiian Village Hotel Gallery in 1961.
 A retrospective of his work was held at the Contemporary Arts Center, Honolulu Advertiser Gallery, in 1966.
 He died in Honolulu on March 23, 1990
Vonn Cummings Sumner (born 1976 in Palo Alto, California) is an internationally exhibited American painter.
 He received his Bachelor of Arts, in 1998 and Master of Fine Arts, Painting in 2000, both from the University of California, Davis, where he studied with, among others, the celebrated American painter and educator Wayne Thiebaud.
Kahlil Gibran (`ka-lil jə-ˈbrän) (November 29, 1922 – April 13, 2008), sometimes known as "Kahlil George Gibran" (note the artist’s preferred Americanized spelling of his first name), was a Lebanese American painter and sculptor from Boston, Massachusetts.
 A student of the painter Karl Zerbe at the School of the Museum of Fine Arts, Boston, Gibran first received acclaim as a magic realist painter in the late 1940s when he exhibited with other emerging artists later known as the "Boston Expressionists".
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 Called a "master of materials", as both artist and restorer, Gibran turned to sculpture in the mid-fifties.
 In 1972, in an effort to separate his identity from his famous relative and namesake, the author of "The Prophet", Gibran Kahlil Gibran, who was cousin both to his father Nicholas Gibran and his mother Rose Gibran, the sculptor co-authored with his wife Jean a biography of the poet entitled "Kahlil Gibran His Life And World".
 Gibran is known for multiple skills, including painting; wood, wax, and stone carving; welding; and instrument making.
Joseph Alexander Ames (1816–1872) was an American artist, primarily known for portrait and genre painting.
 Originally named Joseph Emes, he was born in Roxbury, New Hampshire.
 Ames began painting at a young age.
 At the age of twelve Henry Theodore Tuckerman wrote about one of his paintings.
 After moderate success at home in Saugus, Massachusetts, he left for Boston in 1841.
 While in Boston, Ames tried to replicate the style of Washington Allston.
 In 1848, Ames traveled to Rome, where he painted a portrait of Pope Pius IX that was featured at the National Academy of Design's annual exhibition in 1850.
 When he returned from Italy he was commissioned by Rufus Choate, Daniel Webster, and Abraham Lincoln.
 He kept a studio in Boston in Amory Hall (ca.1849), and later on Tremont Street (ca.1856), and then on Summer Street.
 Ames exhibited at the Boston Athenæum, the National Academy of Design, and the Pennsylvania Academy.
 He eventually moved to Baltimore, and then to New York, where he died of a "brain fever".
Hope Gangloff (born 1974 in Amityville, New York) is an American painter living and working in New York City.
 She studied Art at The Cooper Union for the Advancement of Science and Art.
 Gangloff has exhibited nationally and internationally, with solo shows at the Broad Art Museum in East Lansing, Michigan; the Aldrich Contemporary Art Museum, Ridgefield; and galleries both in the US and Europe.
 She has also exhibited in a number of group shows at institutions such as the Kemper Museum of Contemporary Art in Kansas City; the Philadelphia Academy of Fine Arts; the Weatherspoon Art Museum in Greensboro, and Schunk at PinkPop Festival in The Netherlands.
Amory Hall (c. 1836-c.
 1872) was located on the corner of Washington Street and West Street in Boston, Massachusetts, in the 19th-century.
 Myriad activities took place in the rental hall, including sermons; lectures by Henry David Thoreau, Ralph Waldo Emerson, William Lloyd Garrison; political meetings; exhibitions by Rembrandt Peale, George Catlin, John Banvard; moving panoramas; magic shows; concerts; and curiosities such as the "Nova Scotia Giant Boy."
Edith Ella Baldwin (1848, Worcester, Massachusetts – 1920) was an American painter of portraits and miniatures, a craftswoman, and writer.
 She studied in Paris at Académie Julian, under William-Adolphe Bouguereau and Tony Robert-Fleury; at the Angelo Colarossi studios under Gustave-Claude-Etienne Courtois, also under Julius Rolshoven and Henry Mosler.
 At the Salon of the Champ de Mars, she exhibited a portrait in pastel, in 1901; at exhibitions of the Society of American Artists in 1898 and 1899, she exhibited miniatures; also pictures in oils at Worcester, 1903.
 A collection of her writings are held by Duke University.
 These include unpublished stories, novels, poetry, and lecture notes, as well as diary excerpts.
 Her writings covered the timeless themes of love and religion, but also contemporary issues including automobiles, labor strikes, and women's rights.
Edward William John Hopley (1816–1869), was an English painter.
 He was born in Whitstable, Kent and resided for the early part of his life at Lewes in Sussex.
 He was originally destined for the medical profession, but soon turned to art, settled in London, and after some years succeeded in gaining popularity as a painter of domestic subjects, and also of portraits.
 In 1845 he exhibited at the British Institution a picture entitled "Love not" and in 1854 and 1855 two pictures illustrating the Vicissitudes of Science,’ viz.
 ‘"Sir Isaac Newton explaining to Lord Treasurer Halifax his Theory of Colour"’ and ‘"Michael Angelo in the Gardens of the Medici".’
 In 1859 he exhibited a picture entitled ‘"The Birth of a Pyramid",’ the result of considerable archaeological research and industry, which attracted attention.
 He exhibited first at the Royal Academy of Arts in 1851, when he sent "Psyche".
 His last work was a portrait of the biologist Richard Owen, exhibited at the British Institution in 1869.
 Hopley resided latterly at 14 South Bank, Regent's Park, where he died 30 April 1869, in his fifty-third year.