Though marginal in terms of the world production, tin mining in Cornwall was an important sector in the local economy in the inter-war years 1918-38. To survive in the changing market conditions Cornish mines made every effort to keep the operation on. While they preferred the price control by the combination of world big producers, they continuously asked for financial assistance to the Government. Based on public documents and articles in local newspapers, their responses to the changing market conditions are investigated in a chronological order with special reference to the logic and reasons used during the process of negotiation for the financial assistance to find the difference in the position between them and the Government.