Tredway v. Sanger was a case heard by the United States Supreme Court in 1882. The dispute centered around an agreement between Tredway and Sanger, two business partners who had agreed to divide profits from their joint venture equally. When it came time for them to settle up, however, Sanger refused to pay his share of the profits due to Tredway. In response, Tredway sued him for breach of contract and won at trial court level; however, on appeal the decision was reversed as there were no written documents or witnesses that could prove that such an agreement existed between the parties involved. Ultimately, when this case reached the US Supreme Court they ruled in favor of Tredway because oral contracts are legally enforceable under certain circumstances if both parties have acted upon its terms and conditions with good faith intentions - which is exactly what happened here according to evidence presented before them during trial proceedings.

Justice Field delivered the dissenting opinion in Tredway v. Sanger, arguing that the majority's decision was incorrect and should be reversed. He argued that under California law, a married woman had no right to convey her separate property without her husband's consent; thus, when Mrs. Tredway conveyed land to Mr. Sanger without his knowledge or consent, it was voidable at his option and he could recover possession of it from any person who held title as a result of such conveyance. Justice Field further noted that while there were certain exceptions to this rule which allowed for an independent action by a married woman against third parties who received property from her with notice of the lack of her husband’s consent, none applied in this case since Mr. Sanger did not have actual knowledge or constructive notice regarding the lack of Mr. Tredway’s approval prior to taking title to the land in question; therefore he should not be deprived of its ownership on equitable grounds alone due solely because Mrs. Tredway lacked authority under state law to make such transfer without first obtaining permission from him as required by statute