What Thatcher wrote after visiting the Queen

Of the monuments of the Thatcher era, one of the most intriguing is a small file card, on which are written four pairs of words: Discord-Harmony, Error-Truth, Doubt-Faith, Dispair [sic]-Hope. These are the bones of the prayer attributed (not very plausibly) to St Francis of Assisi that Margaret Thatcher quoted on the steps of 10 Downing Street on her first day as prime minister, 4 May 1979: ‘Where there is discord, may we bring harmony.’ Thatcher had just called on the queen and no doubt wrote the words as an aide-memoire on the short drive back through St James Park from Buckingham Palace.