Brock v. Northwestern Fuel Company was a case heard by the United States Supreme Court in 1910. The case involved a dispute between a coal company and a miner over the terms of a contract. The miner, John Brock, had entered into a contract with the coal company, Northwestern Fuel Company, to mine coal in exchange for a certain amount of money. However, the coal company refused to pay Brock the full amount of money that was agreed upon in the contract. Brock sued the coal company for breach of contract, and the case eventually made its way to the Supreme Court. The Supreme Court held that the coal company was liable for breach of contract, and that Brock was entitled to the full amount of money that was agreed upon in the contract. The Court also held that the coal company was not entitled to any damages for the breach of contract, as the contract was not a valid one. This case established the principle that a contract must be valid in order for a party to be held liable for breach of contract.

In the case of Brock v. Northwestern Fuel Company, Justice Holmes wrote a dissenting opinion in which he argued that the majority's decision was wrong and should be reversed. He believed that the court had failed to consider all relevant facts when determining whether or not an implied contract existed between the parties involved in this dispute. Specifically, he felt that they had overlooked evidence indicating that there may have been an agreement between Mr. Brock and Northwestern Fuel Company regarding his employment status with them for a certain period of time; thus creating an implied contract even if one was never explicitly stated by either party. Furthermore, Justice Holmes argued that it would be unfair to allow companies like Northwestern Fuel Company to avoid their contractual obligations simply because no written document exists outlining those terms - as such agreements are often made verbally without any formal documentation being created at all. Ultimately, he concluded by stating his belief that Mr. Brock should receive compensation from Northwestern Fuel Company for services rendered during his tenure with them due to this implied contract existing between both parties regardless of its lack of formalization on paper or other mediums