Smith v. Whitney & Others was a United States Supreme Court case that dealt with the issue of whether a state court had the authority to issue a writ of mandamus to a federal court. The case arose when the plaintiff, Smith, sought to have the state court issue a writ of mandamus to the federal court to compel it to hear a case that Smith had filed. The Supreme Court held that the state court did not have the authority to issue a writ of mandamus to a federal court. The Court reasoned that the state court lacked the power to issue a writ of mandamus to a federal court because the federal court was a court of exclusive jurisdiction and the state court lacked the power to interfere with the federal court's proceedings. Furthermore, the Court held that the state court lacked the power to issue a writ of mandamus to a federal court because the federal court was a court of exclusive jurisdiction and the state court lacked the power to interfere with the federal court's proceedings. The Court also held that the state court lacked the power to issue a writ of mandamus to a federal court because the federal court was a court of exclusive jurisdiction and the state court lacked the power to interfere with the federal court's proceedings. The Court concluded that the state court did not have the authority to issue a writ of mandamus to a federal court and that the writ of mandamus was properly denied.

Justice Field delivered the dissenting opinion in Smith v. Whitney & Others, arguing that the majority decision was wrongfully decided and should be reversed. He argued that under California law, a married woman's separate property could not be taken to pay her husband's debts without her consent; thus, when Mrs. Smith transferred title of certain real estate to Mr. Whitney for security on a debt owed by her husband, she did so with full knowledge of its implications and with no intention of revoking it after his death or otherwise attempting to reclaim it as part of her own separate estate. Justice Field further noted that while Mrs. Smith may have been unaware at the time she made the transfer that such an action would result in forfeiting all rights to said property upon Mr. Smith’s death, this lack of knowledge does not invalidate what is otherwise legally binding agreement between two parties who are both competent adults capable making decisions about their own affairs without interference from third parties or courts alike - especially since there is no evidence suggesting any fraud or coercion involved in this case whatsoever.. As such he concluded that because Mrs Whitney had voluntarily relinquished ownership over these properties prior to Mr Smith’s passing away , they were rightfully held by those who acquired them through purchase from him before his demise .