Question: At what time did the land rush Robert Galbreath, Jr. and his brother, Herman, begin?

Context paragraphs:
Danny Simmons: Daniel "Danny" Simmons Jr. is a neo-African abstract expressionist painter and the older brother of hip-hop impresario Russell Simmons and rapper Joseph Simmons ("Reverend Run" of Run–D.M.C.).  He is the co-founder and Chairman of Rush Philanthropic Arts Foundation (since 1995), which provides disadvantaged urban youth with arts access and education.  As part of Rush Philanthropic, Simmons also founded Rush Arts Gallery and soon thereafter converted part of his loft in Brooklyn into the Corridor Gallery.  Both galleries provide exhibition opportunities to early and mid-career artists who do not have commercial representation through galleries or private dealers.  Along with his brother Russell, Simmons established Def Poetry Jam, which has enjoyed long-running success on HBO.  In 2004, Simmons published "Three Days As the Crow Flies", a fictional account of the 1980s New York art scene.  He has also written a book of artwork and poetry called "I Dreamed My People Were Calling But I Couldn't Find My Way Home".  He has also published " Deep in your best reflection" and "the Brown beatnik tomes", two additional volumes of poetry.  In 2015 Simmons moved to Philadelphia and opened Rush Arts Philadelphia gallery ( RAP ) to further the Rush Arts mission and to begin to create a national presence for the service organization .

Robert Galbreath, Jr.: Robert Galbreath, Jr. (1863–1953) was a pioneer entrepreneur, wildcatter and oilman in Oklahoma.  A native of Ohio, he traveled to Kansas and California in the late 19th century.  Returning East by way of Indian Territory, he participated with his brother, Herman, in the Land Rush of 1889 for the Unassigned Lands.  Afterward, he sold his claim and settled in the new town of Edmond.  He became an early wildcatter and oil producer.  His most notable accomplishment was the discovery of the Glenn Pool oilfield.

Land run: Land run (sometimes "land rush") usually refers to a historical event in which previously restricted land of the United States was opened to homestead on a first-arrival basis.  Lands were opened and sold first-come or by bid, or won by lottery, or by means other than a run.  The settlers, no matter how they acquired occupancy, purchased the land from the United States Land Office.  For former Indian lands, the Land Office distributed the sales funds to the various tribal entities, according to previously negotiated terms.  The Oklahoma Land Run of 1889 was the most prominent of the land runs while the Land Run of 1893 was the largest.  The opening of the former Kickapoo area in 1895 was the last use of a land run in the present area of Oklahoma.

Hill Country homes: The term, "Hill Country homes", refers to an architectural style of housing found in the part of central Texas, known as the Texas Hill Country.  In the early history of the Republic of Texas, before Texas joined the United States, a land rush began in the middle of the 19th century.  This land rush to central Texas included many immigrants from Germany.  They created settlements with names like Fredricksburg, Bergheim, Boerne, Gruene, New Braunfels, and many others.  These early German immigrants to Texas made their living farming and ranching.  Homes were built using materials found right on the ground using materials such as cypress wood, cedar, adobe brick and limestone.  The original Hill Country homes were quite simple with straight roofs.  The German immigrants mixed some of their own personal influences such as elaborate mill work on the porches and gables.

Cimarron (novel): Cimarron is a novel by Edna Ferber, published in 1929 and based on development in Oklahoma after the Land Rush.  The book was adapted into a critically acclaimed film of the same name in 1931 through RKO Pictures.  In 1960, the story was again adapted for the screen by MGM, to meager success.

Sooners: Sooners is the name given to settlers who entered the Unassigned Lands in what is now the state of Oklahoma before the official start of the Land Rush of 1889.  President Benjamin Harrison officially proclaimed the Unassigned Lands open to settlement on April 22, 1889.  As people lined up around the borders of the Oklahoma District, they waited for the official opening.  It wasn't until noon that it officially was opened to settlement.  The name derived from the "sooner clause" of the act, which stated that anyone who entered and occupied the land prior to the opening time would be denied the right to claim land.

Bill Tilghman: William Matthew "Bill" Tilghman Jr. (July 4, 1854 – November 1, 1924) was a career lawman and gunfighter during the Wild West days of Kansas and Oklahoma.  He was city marshal in Dodge City, participated in the Kansas County Seat Wars, and moved on to Oklahoma where he participated in the land rushes, including the Cherokee Strip Land Rush.  He served as a Deputy U.S. Marshal in Oklahoma and was celebrated for capturing the outlaw Bill Doolin.  Tilghman never achieved the household-word status of his close friends Wyatt Earp and Bat Masterson but released his memoirs in a film that he directed and starred in as himself.  He died at the age of seventy, after being shot down on the streets of Cromwell, Oklahoma.  The fame that Bill Tilghman did achieve was largely due to the efforts of his second wife, who wrote his biography in 1949.

Land Rush of 1889: The Oklahoma Land Rush of 1889 was the first land rush into the Unassigned Lands.  The area that was opened to settlement included all or part of the present-day Canadian, Cleveland, Kingfisher, Logan, Oklahoma, and Payne counties of the US state of Oklahoma.  The land run started at high noon on April 22, 1889, with an estimated 50,000 people lined up for their piece of the available two million acres (8,000 km²).

Alabama Fever: Alabama Fever was the land rush that occurred as settlers and speculators moved in to establish land claims in Alabama as Native American tribes ceded territory.  It came to be characterized as a movement of farmers and their slaves ever further west to new slave states and territories in the pursuit of fertile land for growing cotton.  It was one of the first great American land booms until superseded by the California Gold Rush in 1848.

Tumbleweeds (1925 film): Tumbleweeds is a 1925 American Western film starring and produced by William S. Hart.  It depicts the Cherokee Strip land rush of 1893.  The film is said to have influenced the Oscar-winning 1931 Western "Cimarron", which also depicts the land rush.  The 1939 Astor Pictures' re-release of "Tumbleweeds" includes an 8-minute introduction by the then 75-year-old Hart as he talks about his career and the "glories of the old west."  "Tumbleweeds" was Hart's last movie.

Supporting paragraphs: Robert Galbreath, Jr. Land Rush of 1889
Answer: high noon