The Fellowship of the Frog by Edgar Wallace

Ray Bennett woke with a groan. His temples were splitting, his tongue was parched and dry. When he tried to lift his aching head from the pillow he groaned again, but with an effort of will succeeded in dragging himself from the bed and staggering to the window. He pushed open a leaded casement and looked out upon the green of Hyde Park, and all the time his temples throbbed painfully.

Pouring a glass of water from a carafe, he drank greedily, and, sitting down on the edge of the bed, his head between his hands, he tried to think. Only dimly did he recall the events of the night before, but he was conscious that something dreadful had happened. Slowly his mind started to sort out his experiences, and with a sinking heart he remembered he had struck his father! He shuddered at the recollection, and then began a frantic mental search for justification. The vanity of youth does not readily reject excuses for its own excesses, and Ray was no exception. By the time he had had his bath and was in the first stages of dressing, he had come to the conclusion that he had been very badly treated. It was unpardonable in him to strike his father--he must write to him expressing his sorrow and urging his condition as a reason for the act. It would not be a crawling letter (he told himself) but something dignified and a little distant. After all, these quarrels occurred in every family. Parents were temporarily estranged from their children, and were eventually reconciled. Some day he would go to his father a rich man.