He married Emily Catherine Lockwood in 1889. There are no known children from this marriage, and none are mentioned in her will. Frederick followed his father's footsteps and became a Doctor, training at St. Bartholomew's, London. He received his MRCS Eng. and LSA in 1877. On 30 Mar 1878 he became a Surgeon in the Royal Navy, following in the footsteps of his brother Matthew and uncle Henry. He travelled to the Cape of Good Hope and West Africa on the Boadicea in 1879, and again in 1880, this time on board the Firebrand.
He joined the Masons, more specifically the Pentangle Lodge No 1174, on 10 Dec 1883. His age was given as 24 (although he was 26) and he is described as a Surgeon employed at the Melville Hospital. He resigned on 20/12/84. In those days the Lodge met at the Sun Hotel in Chatham, Kent. A book about Freemasonry that he owned at this time was auctioned on eBay in Feb 2004.
In 1884 he was serving on the Indus, which was described as a Guard Ship of the Reserve, and also the Flag Ship of the Admiral, Superintendent. On 1 Jan 1885 he was assigned to the Triumph, an armour-plated ship, which was about to sail to the Pacific Station, where it would become the Flag Ship. In 1886 the Navy Records show thta he was at the Royal Marine Infirmary at Chatham.
In 1890 he was again serving with the Indus, which was described as Flag Ship at Devonport Dockyard, and by 1894 we was with the President, a Drill Ship for the Royal Naval Reserve at the West India Docks. By Mar 1896 he is no longer listed as either an active or a retired Surgeon.
He was living in Alverdiscott at the time of the 1901 census, and his occupation was given as a retired Staff Surgeon. Alverdiscott is a small village 5 miles south east of Bideford. The 1914 Kelly's Directory of Devonshire gives his address as Pendrean, Salcombe Regis, Sidmouth. He died in 1916 in the Honiton Registration District, and his wife died there in 1924.
It appears that he inheritted the family papers for the Port Isaac branch of the family. He put up the his great-uncle Ralph Clark's diaries up for auction with Sotherby's. They are now owned by the Mitchell Library in Sydney, and are used as one of the sources of information about the First Fleet of convicts to be sent to Australia.
His last known address (Pendrean) is also inscribed in the book "Summary Memoirs of of the Parish of Endellion Prior to the year 1834" variously attributed to his uncle John Watts Trevan, Dr Matthew Trevan and his father Dr Frederick Trevan. This book was also in private hands for many years, but in 1999 it was purchased by the Port Isaac Local History Group who planned to deposit it at the Cornwall Record Office in Truro.
| Date | Address | Event | Extra Info |
|---|---|---|---|
| 7 Apr 1861 | Port Isaac Village | 1861 census | at home with his parents |
| 2 Apr 1871 | Middle Street, Port Isaac | 1871 census | at home with his parents, described as 'Classical Scholar' |
| 1879 | Cape of Good Hope and West Africa | Navy List | ships surgeon on the Boadicea |
| 1880 | Cape of Good Hope and West Africa | Navy List | ships surgeon on the Firebrand |
| 3 Apr 1881 | at sea or in foreign port | 1881 census | Firebrand - crew of 15 men |
| 10 Dec 1883 | Surgeon employed at the Melville Hospital | Masonic records | Member of the Pentangle Lodge No 1174; joined 10 Dec 1883; resigned 20 Dec 1884 |
| 1884 | Navy List | ships surgeon on the Indus | |
| 1885 | Navy List | ships surgeon on the Truimph | |
| 1886 | Royal Marine Infirmary, Chatham | Navy List | |
| 1890 | Devonport Dockyard | Navy List | ships surgeon on the President |
| 5 Apr 1891 | 30 Trafalgar Square, Plymouth | 1891 census | |
| 31 Mar 1901 | 30 Trafalgar Square, Plymouth | 1901 census | |
| 1914 | Pendrean, Salcombe Regis, Sidmouth, Devon | Kelly's Directory of Devonshire | |
| 1916 | Pendrean, Salcombe Regis, Devon? | Frederick's death | Honiton Reigistration District |
| 2 May 1924 | Pendrean, Salcombe Regis, Devon | Emily's will |