But no one knew so well as he did the fact that all the attention latterly given by Paul to the American woman had by no means been the effect of love, but had come from a feeling on Paul's part that he could not desert the woman he had once loved, when she asked him for his kindness. 
Yet he knew well that Paul's attention to the American woman had not been because of love, but because Paul had felt that he could not desert her when she asked him for kindness. 