Approval was granted to the union between Prince Mahidol Adulyadej, the Prince of Songkla Nagarindra, and Sangwan Talabhat, and in 1919, he presented her with a diamond ring on a heart-shaped setting in a private ceremony. Thirty years later, this same ring would be presented by his son, King Bhumibol Adulyadej, to his bride-to-be, Mom Rajawongse Sirikit Kitiyakara. After their engagement, Prince Mahidol bade his fiancée move to Cambridge where she lived with the Williston sisters, Emily and Constance, who tutored her in algebra, Latin, French, and English. The prince also assigned an American woman to take Sangwan on guided tours of museums and art galleries, and explain to her the significance of the various exhibits. The royal wedding of Prince Mahidol Adulyadej and Sangwan Talapat (later Srinagarindra) was held at Sa Pathum Palace on 10 September 1920. The ceremony was presided over by Prince Mahidol Adulyadej's half-brother, King Vajiravudh.