Civil War

 John Adam Houston: The Fugitive Slave (1853)

 Louis Lang: Return of the 69th (Irish) Regiment, N.Y.S.M. from the Seat of War (1862-63)

 Louis-Mathieu-Didier Guillaume: Stonewall Jackson at the Battle of Winchester, Virginia

 Paul Wood: Absolution Under Fire (1891)

 Peter Rothermel: Charge of the Pennsylvania Reserves at Plum Run, Battle of Gettysburg

 Peter Rothermel: Charge of the Pennsylvania Reserves at Plum Run

 Sanford Robinson Gifford: The Camp of the Seventh Regiment near Frederick, Maryland in July 1863 (1864)

 William Trego: Horse Artillery Going into Battle, Skirmish before Petersburg (1893)

 William Trego: The Pell Mell Charge (1887)

 William Trego: The Rescue of the Colors (1899)

 William Trego: Union Soldiers in Combat (1895)

William Trego: Yankee Cavalry Charge

Charles Warren Eaton, ctd

Golden Sunset (ca. 1910)

 Hackensack River (ca. 1885)

 Meadow Walls (1895)

 Melting Snow (ca. 1900)

 Pasture Trees (1896)

 Quiet Shore (ca. 1885)

Snow Slopes (ca. 1890)

Eastman Johnson, ctd

 The Nantucket School of Philosophy (1887)

[about this painting]

 The New Bonnet (1876)

[about this painting]

 The Old Stage Coach (1871)

[about this painting]

 The Reprimand (1880)

 The Toilet (1873)

[the word "toilet" didn't mean the same thing in the 19th century as it does now]

 Thy Word is a Lamp unto My Feet and a Light unto My Path (1878-1881)

 Union Soldiers Accepting a Drink (1865)

[about this painting]

 What the Shell Says (1875)

 Winter,  Portrait of a Child (1879)

Woman in a White Dress (ca. 1873)

Winslow Homer, ctd

 Fisherman's Family (also known as The Lookout) (1881)

 Girl Reading on a Stone Porch (1872)

 Girl Seated

 Girl Watering Plants (1875)

 Girl with a Hay Rake (1878)

 Girl with an Elephant (also known as Woman and Elephant) (1877)

 Haymaking (1864)

 High Cliff, Coast of Maine (1894)

 Home Sweet Home (1863)

[about this painting]

 Hound and Hunter (1892)

 Houses on a Hill (1879)

How Many Eggs? (1873)

Miscellanea

 Carlton Hirschberg: Decoration Day (1885)

[Decoration Day is the original name for Memorial Day.]

 David Dalhoff Neal: Interior of St. Mark's, Venice (1869)

 Erastus Field: Historical Monument of the American Republic (1867)

[article about this painting]

 J. Bond Francisco: The Sick Child (1863)

 James Everett Stuart: On the Columbia River

 Henry Sandham: Lawn Tennis (1886)

 Thomas Anshutz: The Ironworkers' Noontime (1880)

[about this painting]  [article about this painting]

William Henry Buck: Louisiana Pastoral (ca. 1880)

Hudson River School

Here is a group of paintings from the Hudson River School.

 Alvan Fisher: A General View of the Falls of Niagara (1820)

 Alvan Fisher: Pastoral Landscape (1854)

 Alvan Fisher: The Great Horseshoe Fall, Niagara (1820)

 Bradford Freeman: Mount Washington and the Village of North Conway

 David Johnson: Brook Study at Warwick (1873)

 David Johnson: Indian Falls (1853)

 Elizabeth Jerome: Tropical Sunset (1870)

 Francis Augustus Silva: Off the Coast

 George Herbert McCord: A Winter Evening

George Herbert McCord: Lake Luzern, New York (1879)