Supreme Court of the United States
38°53′26″N 77°00′16″W / 38.89056°N 77.00444°W / 38.89056; -77.00444
Established	March 4, 1789; 235 years ago (1789-03-04)
Location	Washington, D.C.
Coordinates	38°53′26″N 77°00′16″W / 38.89056°N 77.00444°W / 38.89056; -77.00444
Composition method	Presidential nomination with Senate confirmation
Authorized by	Constitution of the United States, Art. III, § 1
Judge term length	life tenure, subject to impeachment and removal
Number of positions	9 (by statute)
Website	supremecourt.gov

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This is a list of cases reported in volume 41 (16 Pet.) of United States Reports, decided by the Supreme Court of the United States in 1842.^[1]

Nominative reports

In 1874, the U.S. government created the United States Reports, and retroactively numbered older privately-published case reports as part of the new series. As a result, cases appearing in volumes 1–90 of U.S. Reports have dual citation forms; one for the volume number of U.S. Reports, and one for the volume number of the reports named for the relevant reporter of decisions (these are called "nominative reports").

Richard Peters, Jr.

Starting with the 26th volume of U.S. Reports, the Reporter of Decisions of the Supreme Court of the United States was Richard Peters, Jr. Peters was Reporter of Decisions from 1828 to 1843, covering volumes 26 through 41 of United States Reports which correspond to volumes 1 through 16 of his Peters's Reports. As such, the dual form of citation to, for example, Nixdorff v. Smith is 41 U.S. (16 Pet.) 132 (1842).

Justices of the Supreme Court at the time of 41 U.S. (16 Pet.)

The Supreme Court is established by Article III, Section 1 of the Constitution of the United States, which says: "The judicial Power of the United States, shall be vested in one supreme Court . . .". The size of the Court is not specified; the Constitution leaves it to Congress to set the number of justices. Under the Judiciary Act of 1789 Congress originally fixed the number of justices at six (one chief justice and five associate justices).^[2] Since 1789 Congress has varied the size of the Court from six to seven, nine, ten, and back to nine justices (always including one chief justice).

When the cases in 41 U.S. (16 Pet.) were decided the Court comprised these nine justices:

Portrait	Justice	Office	Home State	Succeeded	Date confirmed by the Senate (Vote)	Tenure on Supreme Court
	Roger B. Taney	Chief Justice	Maryland	John Marshall	March 15, 1836 (29–15)	March 28, 1836 – October 12, 1864 (Died)
	Joseph Story	Associate Justice	Massachusetts	William Cushing	November 18, 1811 (Acclamation)	February 3, 1812 – September 10, 1845 (Died)
	Smith Thompson	Associate Justice	New York	Henry Brockholst Livingston	December 9, 1823 (Acclamation)	September 1, 1823 – December 18, 1843 (Died)
	John McLean	Associate Justice	Ohio	Robert Trimble	March 7, 1829 (Acclamation)	January 11, 1830 – April 4, 1861 (Died)
	Henry Baldwin	Associate Justice	Pennsylvania	Bushrod Washington	January 6, 1830 (41–2)	January 18, 1830 – April 21, 1844 (Died)
	James Moore Wayne	Associate Justice	Georgia	William Johnson	January 9, 1835 (Acclamation)	January 14, 1835 – July 5, 1867 (Died)
	John Catron	Associate Justice	Tennessee	newly-created seat	March 8, 1837 (28–15)	May 1, 1837 – May 30, 1865 (Died)
	John McKinley	Associate Justice	Alabama	newly-created seat	September 25, 1837 (Acclamation)	January 9, 1838 – July 19, 1852 (Died)
	Peter Vivian Daniel	Associate Justice	Virginia	Philip P. Barbour	March 2, 1841 (25–5)	January 10, 1842 – May 31, 1860 (Died)

Notable Cases in 41 U.S. (16 Pet.)

Swift v. Tyson

In Swift v. Tyson, 41 U.S. (16 Pet.) 1 (1842), the US Supreme Court determined that United States federal courts hearing diversity jurisdiction cases under the Judiciary Act of 1789 must apply statutory state laws when the state legislature in question had spoken on the relevant issue, but need not apply the a state's common law if the state's legislature had not spoken on the issue. The decision meant that the federal courts deciding matters not specifically addressed by a state legislature had the authority to develop a federal common law.

Prigg v. Pennsylvania

In Prigg v. Pennsylvania, 41 U.S. (16 Pet.) 539 (1842), the US Supreme Court held that the federal Fugitive Slave Act of 1793 pre-empted a state law that made it a crime to take blacks out of the free state of Pennsylvania and into slavery elsewhere. Also, by refusing to take judicial notice of the problem of free blacks being kidnapped in free states and sold into slavery, Prigg implied that blacks were entitled to fewer procedural protections than were whites.^[3]

Citation style

Under the Judiciary Act of 1789 the federal court structure at the time comprised District Courts, which had general trial jurisdiction; Circuit Courts, which had mixed trial and appellate (from the US District Courts) jurisdiction; and the United States Supreme Court, which had appellate jurisdiction over the federal District and Circuit courts—and for certain issues over state courts. The Supreme Court also had limited original jurisdiction (i.e., in which cases could be filed directly with the Supreme Court without first having been heard by a lower federal or state court). There were one or more federal District Courts and/or Circuit Courts in each state, territory, or other geographical region.

Bluebook citation style is used for case names, citations, and jurisdictions.

• "C.C.D." = United States Circuit Court for the District of . . .
  • e.g.,"C.C.D.N.J." = United States Circuit Court for the District of New Jersey
• "D." = United States District Court for the District of . . .
  • e.g.,"D. Mass." = United States District Court for the District of Massachusetts
• "E." = Eastern; "M." = Middle; "N." = Northern; "S." = Southern; "W." = Western
  • e.g.,"C.C.S.D.N.Y." = United States Circuit Court for the Southern District of New York
  • e.g.,"M.D. Ala." = United States District Court for the Middle District of Alabama
• "Ct. Cl." = United States Court of Claims
• The abbreviation of a state's name alone indicates the highest appellate court in that state's judiciary at the time.
  • e.g.,"Pa." = Supreme Court of Pennsylvania
  • e.g.,"Me." = Supreme Judicial Court of Maine

List of cases in 41 U.S. (16 Pet.)