At this point, Charlotte, at Mercer’s suggestion, wrote to Lord Grey, Leader of the Foxite Whigs in the House of Lords, and asked his advice. He wrote back diplomatically, but with kindness, urging her to be patient. He reminded her a little pompously what she owed to the Prince, ‘both as a Sovereign and as a father’; and that in every question that might arise between them, she should as far as possible avoid opposition to his pleasure. It was important for her ‘at the commencement of your public life (which God grant may be long and glorious) to gain the confidence & affection of the nation’.
After these preliminaries, Grey went on to assure her that her father’s authority was not absolute.’It is his duty to advise, his right to recommend, and standing in the place of the King, he has by law a decided and insurmountable negative on the marriage of such as are under 21.’
He ended by urging her to play for time. ‘Your Royal Highness has hitherto lived in almost total seclusion. The hardship of marrying at once, from such a state, against your inclination…is, I think, too apparent to be persevered in…’
Charlotte was delighted. ‘The advice was absolutely the same exactly line of conduct I had pursued at the interview. Nothing can be more dignified, candid, liberal & impartial than the whole of the letter. It…has made me quite enchanted with him.’
[an extract from ‘Prinny’s Daughter: A Biography of Princess Charlotte of Wales’ by Thea Home]