If anyone has this person in their family tree then I have his Royal Navy Service History from the National Archives at Kew - ref: ADM 188/74.
I got this because I have a William Menhennet in my tree and I thought it might be the same person, but it isn't. So if anyone has William Thomas Menhennett born on the 7 Feb 1858 in Bodmin in their tree I would be more than happy to let them have the copies that I made. When he joined the Navy he was an Erand Boy, so this makes me think he is the son of William and Matilda, who were living at Smithick Hill, Falmouth in the 1871 census.
Val