Susan Elizabeth Gay (born 12 January 1845 in Oswestry, died 17 January 1918 in Crill, Budock) was a chronicler of Falmouth in a book published in 1903 entitled Old Falmouth.
Miss Susan Gay was the daughter of William Gay (1812–1868) and his wife, Charlotte Grace Elizabeth, born Pedersen and the granddaughter of William Gay, the last Falmouth Agent of the General Post Office Packet Service (Old Falmouth, pp. 139–140, 204-206), who retired in 1842.
She was a friend of the Fox family of Falmouth, who provided some of her material (pp. 149–160, 219-222) and illustrations (George Croker Fox p. 149, Anna Maria Fox p. 151, Robert Were Fox FRS p. 153, Joseph Fox, Senior p. 159). Wilson Fox helped her with the Chronology. In her preface, she acknowledges help from them and other Falmouth notables. She ends the preface
"I should mention that this little work is simply a Collecteana, and has no greater pretension". page x.
Miss Gay was also a writer on Theosophy, sometimes using the non-de-plume "Libra".
She was one of the speakers at a celebration of the thirty-second anniversary of Modern Spiritualism on Sunday 4 April 1880, advertised in The Times.
In 1910 or 1911, she was interviewed by Walter Evans-Wentz concerning folktales heard from the peasants around her home at Crill, near Falmouth, published in The Fairy-faith in Celtic Countries.