Cotterill had compiled and published "A Selection of Psalms and Hymns Adapted to the Services of the Church of England" in 1810, but to his disappointment and concern he found that his new parishioners did not take kindly to using it. He therefore enlisted the help of James Montgomery to help him revise the collection and improve it by adding some hymns of the poet's own composition. This new edition, meeting with the approval of the Archbishop of York (and eventually of the parishioners at St Paul's), was finally published in 1820. In 1822 Montgomery published his own "Songs of Zion: Being Imitations of Psalms", the first of several more collections of hymns. During his life he composed some 400 hymns, although less than a hundred of them are commonly sung today.