The Duchess of Edinburgh and Prince Edward have shared a personal detail in a new letter. The couple’s conjugal Coat of Arms, a special family signature, was stamped on a letter sent to LEAF Education. This is a charity close to Sophie’s heart, as the mother-of-two is their honorary president. The duchess personally wrote the letter as an impact report for the organisation, and her signature was featured at the bottom. The Coat of Arms, which is made up of two shields, is steeped in family meaning. Married royal couples are given a joint Coat of Arms, known as their “conjugal” Coat of Arms, wh…