Copies of and extracts from correspondence between AHP and Custance, and materials relating to Custance's career and writings collected by Anthony Pollen. With a carbon copy of a letter from AHP relating to naval gunnery trials in the summer of 1909 and five original letters from Custance to AHP dated 3 December 1913; 9, 24, and 28 November 1916; and 23 July 1931. Also includes a copy of 'The Fighting Power of the Capital Ship', by Custance.