This book explores the epiclesis or invocation of the Holy Spirit in the Eucharistic Prayer, using the Anglican tradition as an historical model of a communion of churches in conscious theological and liturgical dialogue with Christian antiquity. Incorporating major studies of England, North America and the Indian sub-Continent, the author includes an exposition of Inter-Church ecumenical dialogue and the historic divisions between western and eastern Eucharistic traditions and twentieth-century ecumenical endeavour. This unique study of the relationship between theology and liturgical text, commends a theology and spirituality which celebrates the presence of the Holy Spirit in the Eucharist as present and eschatological gift. It thus sets historic, contemporary and ecumenical divisions in a new theological context.