...Asahel Nettleton in America knew the importance of communities praying for each other. At Milton he urged the Christians to pray for revival but then added ' Whether you do or not, it is possible there may be one, for Christians in other places have agreed to pray for you'! This is a reminder than in our praying for revival we should never be parochial and long for the touch of God only for ourselves; we must pray for those churches that do not pray for themselves, as well as for those that do.
Brian Edwards, Revival: A People Saturated With God, p84
Check out the other books on revival I'm using for my current sermon series.