Griffith John - Greatest Welsh Missionary Ever?

I was brought up in Ebenezer Baptist Church, Swansea and the great son of that church is Griffith John (not Steve Levy). Gary Brady points to a report on the BBC about him. The church has recently commemorated his death and John Aaron gives a terrific overview of his life and influence. Griffith John left Swansea in 1855 to go to China, where he did a most remarkable work. There's a couple of biographies out there but John Aaron's talk deserves to be listened to widely