Reverend Elijah Jacob of Ebenezer chapel helped Griffith John go to college after his father’s sudden death.
In 1850 Griffith John entered Brecon Memorial College to train for the ministry. It was here that he became committed to become a missionary after hearing a speech given by a veteran about his work in Madagascar. John was soon accepted by the London Missionary Society.
John’s ordination for the ministry took place on 6 April 1855 at Ebenezer. One week later he married Margaret Jane Griffith, the daughter of a former missionary. He accepted the call from China and left for Shanghai three weeks later with Margaret.