May not and ought not the children of these fathers rightly say: 'Our fathers were Englishmen which came over this great ocean - and were ready to perish in this wilderness; but they cried unto the Lord - and he heard their voice - and looked on their adversity - etc. Let them therefore praise the Lord - because he is good - and his mercies endure forever. Yea - let them which have been redeemed of the Lord - show how he hath delivered them from the hand of the oppressor. When they wandered in the desert wilderness out of the way - and found no city to dwell in - both hungry - and thirsty - their soul was overwhelmed in them. Let them confess before the Lord his loving kindness - and his wonderful works before the sons of men.' In the passage above - what form of oppression is the author writing about?