He even considered joining the Church of Scotland which he had rejected several years earlier. However he was appointed as tutor to the Wedgwood family in 1790 and held this position until the end of 1792.
Siya kahit na itinuturing na sumali sa Simbahan ng Scotland na niya tinanggihan ng ilang taon na mas maaga. Gayunman siya ay hinirang bilang tagapagturo sa Wedgwood pamilya sa 1790 at gaganapin ito sa posisyon hanggang sa katapusan ng 1792.