Two letters: 20th century letter by Admiral J.A. Fisher, and 17th century letter by the Commissioner of Sewers.
Letter from Admiral Fisher to Edward Marsh, 13 June 1914, and letter from Commissioner of Sewers to Commissioner of the Navy complaining of damage done to Poplar Marsh by landing of masts there, 20 Dec 1654, signed by Willian Masham, J. Mathews, and three others. The only link between these letters appears to be the word 'Marsh'.