The Forsyte Saga, Part 3: In Chancery by John Galsworthy

Of all those radiant firms which emblazon with their windows the West End of London, Gaves and Cortegal were considered by Soames the most 'attractive' word just coming into fashion. He had never had his Uncle Swithin's taste in precious stones, and the abandonment by Irene when she left his house in 1887 of all the glittering things he had given her had disgusted him with this form of investment. But he still knew a diamond when he saw one, and during the week before her birthday he had taken occasion, on his way into the Poultry or his way out therefrom, to dally a little before the greater jewellers where one got, if not one's money's worth, at least a certain cachet with the goods.

Constant cogitation since his drive with Jolyon had convinced him more and more of the supreme importance of this moment in his life, the supreme need for taking steps and those not wrong. And, alongside the dry and reasoned sense that it was now or never with his self-preservation, now or never if he were to range himself and found a family, went the secret urge of his senses roused by the sight of her who had once been a passionately desired wife, and the conviction that it was a sin against common sense and the decent secrecy of Forsytes to waste the wife he had.