Sorrell and Son by Warwick Deeping

Sorrell dealt with the late arrivals and their luggage, and never had luggage seemed so light. He was beyond tiredness; he felt that he had climbed above things physical, and that he was on the peak of months of moiling and of effort, looking down and back and upwards in an air that was clear and stimulating. The bull had gone the way of the lioness, and he was left in happy relationship with a man.

Roland's door was ajar, and Sorrell knocked.