We are thus introduced to the very spot where Henry Martyn was born: 'About noon I preached in the piazza adjoining to the Coinage Hall in Truro. I was enabled to speak exceeding plain on "Ye are saved through faith."' In the evening of the same day Wesley preached in the fishing village of Megavissey, 'where I saw a very rare thing--men swiftly increasing in substance, and yet not decreasing in holiness.' From such a land and such influences sprang the first missionary hero of the Church of England in modern times. The Martyn family had for more than a century been known locally as one of skilled miners, described by their ablest representative in recent times[2] as 'mine agents or mine captains who filled positions of trust.' Martin Luther had a similar origin. There is no evidence that any of them went underground, although that, if true, would justify the romance for which Martyn's first biographer is responsible. His great-grandfather was Thomas Martyn, his grandfather was John Martyn of Gwennap Churchtown, and his grand-uncle was the surveyor, Thomas Martyn (1695-1751), who published the map of Cornwall described as a marvel of minute and accurate topography, due to a survey on foot for fifteen years. Mr. Jeffery quotes from some manuscript notes written by his father: John, an elder brother of Thomas Martyn, was the father of John Martyn, who was born at Gwennap Churchtown, and, when young, was put as an accountant at Wheal Virgin Mine. He was soon made cashier to Ralph Allen Daniell, Esq., of Trelissick. Mr. Martyn held one-twenty-fourth of Wheal Unity Mine, where upwards of 300,000_l._ was divided. He then resided in a house opposite the Coinage Hall (now the Cornish Bank), Truro, a little below the present Market House. Here Henry Martyn was born February 18, 1781, and was sent thence to Dr. Cardew's School in 1788. The new Town Hall stands on the site of the house.