James D.G. Dunn's Baptism in the Holy Spirit asserts that Pentecostalism and its doctrine of baptism in the Holy Spirit is built solely on the book of Acts. Dunn thinks that the letters of Paul offer no support for the doctrine of Spirit-baptism and wholly agree with his conversioninitiation understanding of the work of the Holy Spirit. But in making this assertion, Dunn is ignoring a long line of biblical interpretation in the Anglican tradition. This interpretive tradition, which begins with the Puritans and continues through the Keswick convention and the Anglican Charismatic renewal sees the 'sealing of the Spirit' found in 2 Cor 1.21-22 and Eph 1.13-14 as a clear indication that Paul knew a second empowering experience of the Spirit, an experience that is indicated in many places in his letters.