Question:
Barnard grew up in Beaufort West, Cape Province, Union of South Africa. His father, Adam Barnard, was a minister in the Dutch Reformed Church. One of his four brothers, Abraham, was a "blue baby" who died of a heart problem at the age of three (Barnard would later guess that it was tetralogy of Fallot). The family also experienced the loss of a daughter who was stillborn and who had been the fraternal twin of Barnard's older brother Johannes, who was twelve years older than Chris.
Following the first successful kidney transplant in 1953, in the United States, Barnard performed the second kidney transplant in South Africa in October 1967, the first being done in Johannesburg the previous year.  On 23 January 1964, James Hardy at the University of Mississippi Medical Center in Jackson, Mississippi, performed the world's first heart transplant and world's first cardiac xenotransplant by transplanting the heart of a chimpanzee into a desperately ill and dying man. This heart did beat in the patient's chest for approximately 60 to 90 minutes. The patient, Boyd Rush, died without ever regaining consciousness.  Barnard had experimentally transplanted forty-eight hearts into dogs, which was about a fifth the number that Adrian Kantrowitz had performed at Maimonides Medical Center in New York and about a sixth the number Norman Shumway had performed at Stanford University in California. Barnard had no dogs which had survived longer than ten days, unlike Kantrowitz and Shumway who had had dogs survive for more than a year.  With the availability of new breakthroughs introduced by several pioneers, also including Richard Lower at the Medical College of Virginia, several surgical teams were in a position to prepare for a human heart transplant. Barnard had a patient willing to undergo the procedure, but as with other surgeons, he needed a suitable donor.  During the Apartheid era in South Africa, non-white persons and citizens were not given equal opportunities in the medical professions. At Groote Schuur Hospital, Hamilton Naki was an informally taught surgeon. He started out as a gardener and cleaner. One day he was asked to help out with an experiment on a giraffe. From this modest beginning, Naki became principal lab technician and taught hundreds of surgeons, and assisted with Barnard's organ transplant program. Barnard said, "Hamilton Naki had better technical skills than I did. He was a better craftsman than me, especially when it came to stitching, and had very good hands in the theatre". A popular myth, propagated principally by a widely discredited documentary film called Hidden Heart and an erroneous newspaper article , maintains incorrectly that Naki was present during the Washkansky transplant.
Answer this question using a quote from the text above:

Tell me about the historical context of Christiaan Barnard.

Answer:
Barnard had experimentally transplanted forty-eight hearts into dogs, which was about a fifth the number that Adrian Kantrowitz had performed at Maimonides Medical Center in New York

Answer the question at the end by quoting:

Georgette Heyer (; 16 August 1902 - 4 July 1974) was an English historical romance and detective fiction novelist. Her writing career began in 1921, when she turned a story for her younger brother into the novel The Black Moth.
While holidaying with her family in December 1920, Heyer met George Ronald Rougier, who was two years her senior. The two became regular dance partners while Rougier studied at the Royal School of Mines to become a mining engineer. In the spring of 1925, shortly after the publication of her fifth novel, they became engaged. One month later, Heyer's father died of a heart attack. He left no pension, and Heyer assumed financial responsibility for her brothers, aged 19 and 14. Two months after her father's death, on 18 August, Heyer and Rougier married in a simple ceremony.  In October 1925 Rougier was sent to work in the Caucasus Mountains, partly because he had learned Russian as a child. Heyer remained at home and continued to write. In 1926, she released These Old Shades, in which the Duke of Avon courts his own ward. Unlike her first novel, These Old Shades focused more on personal relationships than on adventure. The book appeared in the midst of the 1926 United Kingdom general strike; as a result, the novel received no newspaper coverage, reviews, or advertising. Nevertheless, the book sold 190,000 copies. Because the lack of publicity had not harmed the novel's sales, Heyer refused for the rest of her life to promote her books, even though her publishers often asked her to give interviews. She once wrote to a friend that "as for being photographed at Work or in my Old World Garden, that is the type of publicity which I find nauseating and quite unnecessary. My private life concerns no one but myself and my family."  Rougier returned home in the summer of 1926, but within months he was sent to the East African territory of Tanganyika. Heyer joined him there the following year. They lived in a hut made of elephant grass located in the bush; Heyer was the first white woman her servants had ever seen. While in Tanganyika, Heyer wrote The Masqueraders; set in 1745, the book follows the romantic adventures of siblings who pretend to be of the opposite sex in order to protect their family, all former Jacobites. Although Heyer did not have access to all of her reference material, the book contained only one anachronism: she placed the opening of White's a year too early. She also wrote an account of her adventures, titled "The Horned Beast of Africa", which was published in 1929 in the newspaper The Sphere.  In 1928, Heyer followed her husband to Macedonia, where she almost died after a dentist improperly administered an anaesthetic. She insisted they return to England before starting a family. The following year Rougier left his job, making Heyer the primary breadwinner. After a failed experiment running a gas, coke, and lighting company, Rougier purchased a sports shop in Horsham with money they borrowed from Heyer's aunts. Heyer's brother Boris lived above the shop and helped Rougier, while Heyer continued to provide the bulk of the family's earnings with her writing.

Where was Georgette during this time?
Heyer's brother Boris lived above the shop and helped Rougier, while Heyer continued to provide the bulk of the family's earnings with her writing.