Candidates for the Welsh Calvinistic Methodist Connexional ministry were compelled to shift for themselves until 1837, when Lewis Edwards (1809–1887) and David Charles (1812–1878) opened a school for young men at Bala. North and South alike adopted it as their college, the associations contributing a hundred guineas each towards the education of their students. In 1842, the South Wales Association opened a college at Trevecca in the old home of Howell Harris. The Rev. David Charles became principal of Trevecca (from 1842 to 1863), and the Rev. Lewis Edwards of Bala. After the death of Dr Lewis Edwards, Dr. Thomas Charles Edwards resigned the principalship of the University College at Aberystwyth to become head of Bala (1891), now a purely theological college, the students of which were sent to the university colleges for their classical training.