What follows is an opinion from the Supreme Court of the United States. Your task is to identify the court in which the case originated. Focus on the court in which the case originated, not the administrative agency. For this reason, if appropiate note the origin court to be a state or federal appellate court rather than a court of first instance (trial court). If the case originated in the United States Supreme Court (arose under its original jurisdiction or no other court was involved), note the origin as "United States Supreme Court". If the case originated in a state court, note the origin as "State Court". Do not code the name of the state. The courts in the District of Columbia present a special case in part because of their complex history. Treat local trial (including today's superior court) and appellate courts (including today's DC Court of Appeals) as state courts. Consider cases that arise on a petition of habeas corpus and those removed to the federal courts from a state court as originating in the federal, rather than a state, court system. A petition for a writ of habeas corpus begins in the federal district court, not the state trial court. Identify courts based on the naming conventions of the day. Do not differentiate among districts in a state. For example, use "New York U.S. Circuit for (all) District(s) of New York" for all the districts in New York.

Opinion:
MISSISSIPPI v. ARKANSAS
No. 48,
Orig.
Argued December 5, 1973
Decided February 26, 1974
Blackmun, J., delivered the opinion of the Court, in which Burger, C. J., and Brennan, Stewart, White, Marshall, Powell, and Rehnquist, JJ., joined. Douglas, J., filed a dissenting opinion, post, p. 294.
Mitchell E. Ward argued the cause for plaintiff. With him on the brief were Albioun F. Summer, Attorney General of Mississippi, and Martin R. McLendon, Assistant Attorney General.
William H. Drew argued the cause for defendant. With him on the brief was Jim Guy Tucker, Attorney General of Arkansas.
Mr. Justice Blackmun
delivered the opinion of the Court.
Mississippi, prompted by the pendency of private title litigation in the Arkansas courts, instituted this original action against Arkansas in November 1970. The bill of complaint, which accompanied the motion for leave to file, prayed that the boundary line between the two States, in the old bed of the Mississippi River from the upstream end to the downstream end of Tarpley Cut-off, that is, the Spanish Moss Bend-Luna Bar-Carter Point area where Arkansas’ Chicot County and Mississippi’s Washington County adjoin, be fixed and determined.
The river was originally established as the boundary between the States by their respective Acts of Admission. Mississippi’s Act, 3 Stat. 348 (1817), described the line as “up” the river. Arkansas’ Act, 5 Stat. 50 (1836), described the line as “up the middle of the main channel of the said river.” See, also, Arkansas’ Constitution, Art. 1 (1874). Over 50 years ago the question whether there was any difference in the meaning' of these two descriptions was resolved and the boundary was determined to be “the middle of the main navigable channel, and not along the line equidistant between the banks.” Arkansas v. Mississippi, 250 U. S. 39, 43 (1919). That decision was in conformity with the rule of the thalweg enunciated in Iowa v. Illinois,, 147 U. S. 1, 7-8, 13 (1893), and followed, in the absence of special circumstances, in many subsequent cases. See, for example, Minnesota v. Wisconsin, 252 U. S. 273, 281-282 (1920); New Jersey v. Delaware, 291 U. S. 361, 379-380 (1934); Arkansas v. Tennessee, 310 U. S. 563, 571 (1940).
Arkansas responded to Mississippi’s motion and moved that leave to file be denied and that the complaint be dismissed. The motion for leave to file, however, was granted. 400 U. S. 1019 (1971). Thereafter, the Honorable Clifford O’Sullivan was appointed Special Master. 402 U. S. 926 (1971). The Master’s report eventually issued and was ordered filed. 411 U. S. 913 (1973). Arkansas’ exceptions to the report and Mississippi’s response to those exceptions were forthcoming in due course and the case has been argued to this Court.
Prior to 1935 Spanish Moss Bend was on the thalweg, or primary channel, of the Mississippi River. It has not been the thalweg, however, since the Tarpley Cut-off was established about five miles to the east in 1935 by the United States Army Corps of Engineers. The present controversy focuses on what is known as Luna Bar on the eastern bank of the old river at Spanish Moss Bend. The issue simply is whether Luna Bar came into being by gradual migration of the river westward, or, instead, by some avulsive process, also to the westward. Depending on the resolution of this factual issue, legal consequences ensue in line with established principles conceded by the two States to be the law relating to riparian accretion and avulsion. Nebraska v. Iowa, 143 U. S. 359 (1892); Missouri v. Nebraska, 196 U. S. 23 (1904); Bonelli Cattle Co. v. Arizona, 414 U. S. 313, 325-327 (1973). These principles need no reiteration here. It suffices to say that if Luna Bar was formed by accretion, this litigation is to be resolved in favor of Mississippi, and, contrarily, if Luna Bar resulted from an avulsion, the suit is to be resolved in favor of Arkansas.
Upon our independent review of the record, we find ourselves in complete agreement and accord with the findings of fact made by the Special Master. Report 34. We therefore affirm those findings, overrule Arkansas’ exceptions to the Master’s report, confirm that report, and in general accept the Master’s recommendations for a decree.
We deem it unnecessary to outline at length the evidence adduced, or to reproduce here the detailed analysis of that evidence made by the Special Master. We note only that the dissent would regard the case as close because of three factors: (1) certain testimony as to ancient trees on Luna Bar indicated by the presence of three stumps that could not have lived and died there in the last 100 years, (2) some testimony as to soil on the bar “not compatible with the soil that would result from accretion,” post, at 298, and (3) the bar’s “hard core . . . elevation,” post, at 299-300, that coincides with the elevation “on the adjacent Arkansas bank.” These factors, in our view, would be pertinent except that they reflect only the approach and testimony of Arkansas’ witnesses and overlook pertinent and persuasive testimony to the opposite effect from expert witnesses for Mississippi. The latter are the witnesses that the Special Master credited, as do we, in the evaluation of the conflicting testimony.
Arkansas conceded that Mississippi made out a prima facie case of accretion. Tr. of Oral Arg. 19. In addition, the Master was impressed with the total absence of any known historical reference to an avulsion in this area that changed the course of the river by the necessary half mile. And the dissent acknowledges, post, at 295, as to how “Mississippi made its case,” and concedes that the testimony “gives force to the argument that accretion formed Luna Bar,” that there was testimony that in the Mississippi River “avulsion would shorten the course of the river, while here the course was lengthened,” and that Mississippi's experts knew of no instance “where avulsion had worked the way Arkansas claims.”
So far as the ancient tree stumps are concerned, Mississippi presented evidence from forestry experts that the forest on Luna Bar was one predominantly of pioneer species with the expected small accompanying, scattered areas of secondary and climax trees, and with no tree more than 37 years old. This is consistent with the first appearance of growth upon Luna Bar depicted in early Mississippi River Commission charts showing the bar to be barren and without vegetation. Report 10. Mississippi's position as to the three particular stumps was that they had been washed in by floodwaters in preceding years; that one had moss on its roots, a condition incompatible with growth in place; and that, at the point where another allegedly was found in 1972, the elevation of the bar was at least 10 feet above what it had been 90 years earlier. Thus the stump necessarily should have been deep in the undersoil of the bar and not on its surface at the time of its removal. Report 11.
The soil composition is purely a matter of conflicting testimony and we are persuaded by Mississippi's evidence. Deep borings, of course, would be below the riverbed, and would be expected to be consistent throughout the area on both sides of the river. And, as noted above, charts of 1882 and 1894, admitted into evidence, show Luna Bar as a dry sandbar with no vegetation.
The claim of similar elevations, too, encounters strong and convincing opposing authority. Dr. Charles R. Kolb, a highly qualified expert for Mississippi, testified that his study disclosed that the Arkansas bank, from the first comparative recordings until fairly recent times, was about 12 feet higher than Luna Bar. Report 15, 19. R. 354-357. And there is an absence of levee formations on Luna Bar, as contrasted with the presence of pre-1860 levees on the Arkansas bank.
We agree with the Special Master’s evaluation of the evidence and conclude, as he did, that Arkansas did not sustain its burden of rebutting Mississippi’s conceded prima facie case, a burden the Arkansas court has described as “considerable.” Pannell v. Earls, 252 Ark. 385, 388, 483 S. W. 2d 440, 442 (1972).
Upon our own consideration and our independent review of the entire record, of the report filed by the Special Master, of the exceptions filed thereto, and of the argument thereon, a decree is accordingly entered.
It is so ordered.
[For decree adopted and entered by the Court, see post, p. 302.]
See Arkansas Land & Cattle Co. v. Anderson-Tully Co., 248 Ark. 495, 452 S. W. 2d 632 (1970), a 4-3 decision of the Supreme Court of Arkansas.
Mississippi's Constitution of 1890, Art. 2, however, reads, “up the middle of the Mississippi river, or thread of the stream.”
Other orders are reported at 402 U. S. 939 (1971) and at 403 U. S. 951 (1971).
Although the precedent is not binding in this original action between the two States, it is not without interest to note that in private litigation Luna Bar has been determined to be in Mississippi. Anderson-Tully Co. v. Walls, 266 F. Supp. 804 (ND Miss. 1967). Another private suit involving the issue is the one mentioned above as pending in the Arkansas state courts. Arkansas Land & Cattle Co. v. Anderson-Tully Co., supra. Further proceedings in that litigation were stayed on February 16, 1971, by the Chancery Court of Chicot County, Arkansas, until final judgment in the present action. Special counsel for the respective States here were counsel for the private parties in the cited federal and state court cases.

Question: What is the court in which the case originated?

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Answer: 211