John Coulson Tregarthen FZS (9 September 1854 – 17 February 1933) was a Cornish[1] field naturalist and author, described as "the best loved Cornishman of his time".
He was educated at Penzance Grammar School and Wren's, and graduated with Mathematical Honours from London University in 1878.
Corelli was soon to become his mentor, recommending him to her publisher, John Murray, and Tregarthen subsequently was to dedicate many of his books to her.
In 1881 Tregarthen married Rose, the youngest daughter of W. Huntley Bailey of Maida Vale; they had one son.
[2] Tregarthen spent his final years at his house, "Rosemorran", which is in Edgecumbe Gardens, Newquay, Cornwall.