Minister, he was trained at Homerton College. In 1800, despite his lack of experience and youth (he was only 18 years old), he was invited to pastorate in Peckham, London. In 1801 he was ordained to the ministry and in January 1802 he began preaching in a large but almost empty building. Under his ministry the church began to grow rapidly in the next six years. Dr Collyer's congregation reached over 1,000 and royalty regularly worshipped in what became known as 'Hanover Chapel'. He received an honorary doctorate from Edinburgh University at the recommendation of the Duke of Kent. It is likely that Queen Victoria was taken to Hanover Chapel as a little girl - by her parents. Dr Collyer is said to have preached more sermons than anyone else in his time. He wrote a seven volume series on divine revelation. His writings and hymns books included: A supplement to Dr Watts' Psalms and Hymns (1812) Services suited to the solemnization of matrimony, baptism, etc. (1848); and Hymns for Israel, a tribute of love for God's ancient people (1848).