Under cover of darkness on the evening of April 30, a British submarine lowered Major Martin’s body into the sea off the coast of Huelva, Spain. (Eric Grundhauser)

Major Martin was eventually buried with full military honours in Cementario de la Soledad in Huelva, Spain. The gravestone reads, "William Martin, born 29 March 1907, died 24 April 1943, beloved son of John Glyndwyr Martin and the late Antonia Martin of Cardiff, Wales." After the British Government revealed Michael's true identity in 1998, the gravestone was amended to read, "Glyndwyr Michael; served as Major William Martin, RM." The grave is a fitting tribute to Glyndwyr Michael: the man who never was.