The long service connection of the Fremantle family with the Royal Navy has led to the preservation of a series of personal papers covering many aspects of the naval service from 1793-1928. Most of the arrangement of loose papers was supervised by Sir Sydney and his own papers have been carefully annotated.

Vice Admiral Sir Thomas Francis Fremantle 1768-1829; They consist of three logs, 1793 to 1796, two signal notebooks, undated, two memoranda on naval discipline, 1806, and some printed material relating to the French and Spanish navies.

Captain Stephen Grenville Fremantle 1810-1860; They cover Fremantle's career well, especially the Maori and Ashanti war periods They include logs, 1849 and 1859, 1856 to 1857 and 1873 to 1881; letterbooks, 1862 to 1876, 1879 to 1880; personal letters written mainly between 1864 and 1866 and papers relating to his commands, 1889 to 1895. There is also a section which deals with his court martial for grounding the Eclipse in 1866.

Admiral the Honourable Sir Edmund Robert Fremantle 1836-1929; . They consist of logs, 1828 to 1829, 1839 to 1841; letter and order books, 1839 to 1842, 1852 to 1857, and a private record of letters sent and received, 1847 to 1848. There is also a privately-printed statement in answer to the charges made against him as Captain of the Juno.

Admiral Sir Sydney Robert Fremantle; They consist of a memorandum on the war in the Aegean, 1916 to 1917, detailed minutes compiled while he held office as Deputy Chief of Naval Staff and other papers relating to this post. There are also collected essays and articles written by Fremantle, 1904 to 1919.

Administrative / biographical background
The four members of the family whose papers are included in this collection are: Vice Admiral Sir Thomas Francis Fremantle 1768-1829 Captain Stephen Grenville Fremantle 1810-1860 Admiral the Honourable Sir Edmund Robert Fremantle 1836-1929 Admiral Sir Sydney Robert Fremantle 1867 For biographical details see the sub-collection level records.