Deacon's interest in liturgics and spirituality are evidenced in his Compleat Collection of Devotions (1734). This book included a new liturgy, "The Order of the Divine Offices of the Orthodox British Church", which replaced the earlier one from 1718. In this liturgy Deacon added other ancient liturgical practices including infant communion. The book also included excerpts from John Wesley's `Essay upon the Stationary Fasts'. Wesley met Deacon through John Clayton of Manchester who had been part of Wesley's Oxford group, which led to the invitation of the future Methodist founder to contribute to the book. Though never becoming an official Anglican liturgy, Deacon's incorporation of ancient Christian liturgies and reclaiming of the doctrine of eucharistic sacrifice would influence later liturgical developments.
