This is a collection of correspondence (1810-1864) and 12 diaries (1811-1868). Persons represented include Asa Fish, Dr. Asa Fish, Asa Fish III, Benjamin Fish, Emeline (Beebe) Fish, John Dean Fish, Prudence Fish, Capt. Nathan Fish, Sands Helme Fish, Silas Fish, and Fanny Dean (Fish) Woodhull.

Chiefly letters written to Simeon G. Fish, son of shipbuilder Nathan G. Fish, owner of Maxon, Fish & Co., containing descriptions of social life and daily activities in Mystic during the mid-19th century. Other persons represented include members of the Miner and Randall families.