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After his book on Austin, Barker published in 1928 ''Mexico and Texas 1821-1835'' and in 1929, ''Readings in Texas History.'' He and Miss Amelia Williams undertook the collection of the Sam Houston papers, which were published in eight volumes between 1938 and 1943.<ref name=utex/> From 1927 to 1932, he was active in the short-lived East Texas Historical Association, reborn in 1962 and based on the campus of [[Stephen F. Austin State University]] in [[Nacogdoches]]<ref>{{cite web|url=http://www.tshaonline.org/handbook/online/articles/vte01|title=Archie P. McDonald, "East Texas Historical Association"|publisher=tshaonline.org|accessdate=March 26, 2010}}</ref>​

After his book on Austin, Barker published in 1928 ''Mexico and Texas 1821-1835'' and in 1929, ''Readings in Texas History.'' He and Miss Amelia Williams undertook the collection of the Sam Houston papers, which were published in eight volumes between 1938 and 1943.<ref name=utex/> From 1927 to 1932, he was active in the short-lived East Texas Historical Association, reborn in 1962 and based on the campus of [[Stephen F. Austin State University]] in [[Nacogdoches]]<ref>{{cite web|url=http://www.tshaonline.org/handbook/online/articles/vte01|title=Archie P. McDonald, "East Texas Historical Association"|publisher=tshaonline.org|accessdate=March 26, 2010}}</ref>​

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Barker served as managing editor from 1910 to 1937 of ''The Southwestern Historical Quarterly,'' published by the Texas State Historical Association. He edited the articles and wrote many himself. He showed how Texas impacted national development and westward expansion. He repudiated those who claimed that the westward expansion of the United States, the acquisition of Texas, and the Mexican Cession of 1848, were the results of a conspiracy of southerners to expand [[Slavery|slave]] territory. He also rejected those who claimed that the [[Texas War for Independence]] and the [[Mexican War]] were caused primarily by Mexico.<ref name=utex/>​

Barker served as managing editor from 1910 to 1937 of ''The Southwestern Historical Quarterly,'' published by the Texas State Historical Association. He edited the articles and wrote many himself. He showed how Texas impacted national development and westward expansion. He repudiated those who claimed that the westward expansion of the United States, the acquisition of Texas, and the Mexican Cession of 1848, were the results of a conspiracy of southerners to expand [[Slavery|slave]] territory. He also rejected those who claimed that the [[Texas War of Independence]] and the [[Mexican War]] were caused primarily by Mexico.<ref name=utex/>​

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Barker was responsible for the University of Texas library becoming a repository of authentic sources on the [[American Civil War]]. Much of those works were possible from the George W. Littlefield Fund, an initial $125,000 donation, which sought to tell the "Southern" side of history. UT hence also became a major repository of the history of the American South.<ref name=utex/>​

Barker was responsible for the University of Texas library becoming a repository of authentic sources on the [[American Civil War]]. Much of those works were possible from the George W. Littlefield Fund, an initial $125,000 donation, which sought to tell the "Southern" side of history. UT hence also became a major repository of the history of the American South.<ref name=utex/>​

Barker wrote textbooks used from third grade to high school. In 1912, Barker, C. W. Ramsdell and C. S. Potts published ''A School History of Texas,'' the state-adopted text for many years. Among his associates in writing the school textbooks were Henry Steele Commager, who later became an academic critic of [[U.S. Senator]] [[Joe McCarthy|Joseph Raymond McCarthy]] of [[Wisconsin]]; William E. Dodd, later [[U.S. President]] [[Franklin D. Roosevelt]]'s ambassador to [[Nazi Germany]]; and Walter Prescott Webb (1888-1963), an East Texas native who had studied western history under Barker. As department chairman, Barker concentrated on making the UT history department second to none in its field nationally. He encouraged scholars to work in one another’s fields as their research interests so led them. He disdained any scholar claiming virtual "ownership" of a particular field of study.<ref name=utex/>​

Barker wrote textbooks used from third grade to high school. In 1912, Barker, C. W. Ramsdell and C. S. Potts published ''A School History of Texas,'' the state-adopted text for many years. Among his associates in writing the school textbooks were Henry Steele Commager, who later became an academic critic of [[U.S. Senator]] [[Joe McCarthy|Joseph Raymond McCarthy]] of [[Wisconsin]]; William E. Dodd, later [[U.S. President]] [[Franklin D. Roosevelt]]'s ambassador to [[Nazi Germany]]; and Walter Prescott Webb (1888-1963), an East Texas native who had studied western history under Barker. As department chairman, Barker concentrated on making the UT history department second to none in its field nationally. He encouraged scholars to work in one another’s fields as their research interests so led them. He disdained any scholar claiming virtual "ownership" of a particular field of study.<ref name=utex/>​

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==Personal life and political views==

==Personal life and political views==

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