 However, assisted by an uncle, he resigned his apprenticeship and was tutored by Rev Hay, vicar of St Stephen Coleman Street.As a practising Dissenter, Maddox was given a grant from the Presbyterian Fund to study for the Dissenting ministry at the University of Edinburgh.Here he befriended John Horsley who later became the father of Samuel Horsley, who at that time was also destined for the Dissenting ministry.