Bessler, Waechter, Glover & Co v South Derwent Coal Co Ltd The claimants made three separate contracts for the supply of coal by the respondents. Deliveries under the first contract were to be made from 1 April 1935 to 31 December 1935; under the second, from 1 January 1936 to 30 June 1936; and under the third, from 1 April 1936 to 31 December 1936; that is, there would be double deliveries between 1 April 1936 and 30 June 1936.