Correspondence between Henry Watkin Darbishire and Harold Darbishire Pertaining to the increasing working costs of the P.&W.G.Co. Ltd. The letters provide a summary of the Quarries working account, a comparison of costs for the years 1913, 1929 and 1933, figures for the profit and loss account for the same years and reasons for the increases. 3 January 1934 - 5 January 1934