Answer the question at the end by quoting:

Henry Havelock Ellis, known as Havelock Ellis (2 February 1859 - 8 July 1939), was an English physician, writer, progressive intellectual and social reformer who studied human sexuality. He co-authored the first medical textbook in English on homosexuality in 1897, and also published works on a variety of sexual practices and inclinations, as well as on transgender psychology. He is credited with introducing the notions of narcissism and autoeroticism, later adopted by psychoanalysis. Ellis was among the pioneering investigators of psychedelic drugs and the author of one of the first written reports to the public about an experience with mescaline, which he conducted on himself in 1896.
Ellis was strongly opposed to the idea of castration for eugenic purposes. In 1909, regulations were introduced at the Cantonal Asylum in Bern, which allowed those deemed 'unfit' and with strong sexual inclinations to be mandatorily sterilized. In a particular instance, several men and women, including epileptics and pedophiles were castrated, some of whom voluntarily requested it. While the results were positive, in that none of the subjects were found guilty of any more sexual offences, Ellis remained staunchly opposed to the practice. His view on the origin of these inclinations was that sexual impulses do not reside in the sexual organs, but rather they persist in the brain. Moreover, he posited that the sexual glands provided an important source of internal secretions vital for the functioning of the organism, and thus their removal could greatly injure the patient. However, already in his time, Ellis was witness to the rise of vasectomies and ligatures of the Fallopian tubes, which performed the same sterilization without removing the whole organ. In these cases, Ellis was much more favorable, yet still maintaining that "sterilization of the unfit, if it is to be a practical and humane measure commanding general approval, must be voluntary on the part of the person undergoing it, and never compulsory." His opposition to such a system was not only rooted in morality. Rather, Ellis also considered the practicality of the situation, hypothesizing that if an already mentally unfit man is forced to undergo sterilization, he would only become more ill-balanced, and would end up committing more anti-social acts. Though Ellis was never at ease with the idea of forced sterilizations, he was willing to find ways to circumvent that restriction. His focus was on the social ends of eugenics, and as a means to it, Ellis was in no way against 'persuading' 'volunteers' to undergo sterilization by withdrawing Poor Relief from them. While he preferred to convince those he deemed unfit using education, Ellis supported coercion as a tool. Furthermore, he supported adding ideas about eugenics and birth control to the education system in order to restructure society, and to promote social hygiene. For Ellis, sterilization seemed to be the only eugenic instrument that could be used on the mentally unfit. In fact, in his publication The Sterilization of the Unfit, Ellis argued that even institutionalization could not guarantee the complete prevention of procreation between the unfit, and thus, "the burdens of society, to say nothing of the race, are being multiplied. It is not possible to view sterilization with enthusiasm when applied to any class of people...but what, I ask myself, is the practical alternative?"

What methods of coercion did he think were appropriate?

Ellis was in no way against 'persuading' 'volunteers' to undergo sterilization by withdrawing Poor Relief from them.

Answer the question at the end by quoting:

Sitting Bull was born on land later included in the Dakota Territory. In 2007, Sitting Bull's great-grandson asserted from family oral tradition that Sitting Bull was born along the Yellowstone River, south of present-day Miles City, Montana. He was named Jumping Badger at birth, and nicknamed Hunkesi, or "Slow," said to describe his careful and unhurried nature. When the boy was fourteen years old he accompanied a group of Lakota warriors (which included his father and his uncle Four Horns) in a raiding party to take horses from a camp of Crow warriors.
Sitting Bull's band of Hunkpapa continued to attack migrating parties and forts in the late 1860s. When in 1871 the Northern Pacific Railway conducted a survey for a route across the northern plains directly through Hunkpapa lands, it encountered stiff Lakota resistance. The same railway people returned the following year accompanied by federal troops. Sitting Bull and the Hunkpapa attacked the survey party, which was forced to turn back. In 1873, the military accompaniment for the surveyors was increased again, but Sitting Bull's forces resisted the survey "most vigorously." The Panic of 1873 forced the Northern Pacific Railway's backers (such as Jay Cooke) into bankruptcy. This halted construction of the railroad through Lakota, Dakota, and Nakota territory. After the 1848 finding of gold in the Sierra Nevada and dramatic gains in new wealth from it, other men became interested in the potential for gold mining in the Black Hills. In 1874, Lt. Col. George Armstrong Custer led a military expedition from Fort Abraham Lincoln near Bismarck, to explore the Black Hills for gold and to determine a suitable location for a military fort in the Hills. Custer's announcement of gold in the Black Hills triggered the Black Hills Gold Rush. Tensions increased between the Lakota and whites seeking to move into the Black Hills. Although Sitting Bull did not attack Custer's expedition in 1874, the US government was increasingly pressured by citizens to open the Black Hills to mining and settlement. Failing in an attempt to negotiate a purchase or lease of the Hills, the government in Washington had to find a way around the promise to protect the Sioux in their land, as specified in the 1868 Treaty of Fort Laramie. It was alarmed at reports of Sioux depredations (encouraged by Sitting Bull). In November 1875, President Grant ordered all Sioux bands outside the Great Sioux Reservation to move onto the reservation, knowing full well that not all would comply. As of February 1, 1876, the Interior Department certified as "hostile" those bands who continued to live off the reservation. This certification allowed the military to pursue Sitting Bull and other Lakota bands as "hostiles". Based on tribal oral histories, historian Margot Liberty theorizes many Lakota bands allied with the Cheyenne during the Plains Wars because they thought the other nation was under attack by the US. Given this connection, she suggests the major war should have been called "The Great Cheyenne War". Since 1860, the Northern Cheyenne had led several battles among the Plains Indians. Before 1876, the U.S. Army had destroyed seven Cheyenne camps, more than those of any other nation. Other historians, such as Robert M. Utley and Jerome Greene, also use Lakota oral testimony, but they have concluded that the Lakota coalition, of which Sitting Bull was the ostensible head, was the primary target of the federal government's pacification campaign.

what wa the gold hill rush?
men became interested in the potential for gold mining in the Black Hills.