Vicar of Madeley in Shropshire. A Swiss by birth and education, he came to England in 1750. Probably in 1753 he joined the Methodist movement (then still within the C of E). He was ordained in 1757 and in 1760 accepted the living of Madeley. Although he resisted J. Wesley's desire to designate him as his successor in the leadership of the Methodists, his sanctity won him a strong personal influence in the movement.